42 results on '"Simon, Amélie"'
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2. Polarization of stars with debris disks: comparing observations with models
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Vandeportal, Julien, Bastien, Pierre, Simon, Amélie, Augereau, Jean-Charles, and Storer, Émilie
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Astrophysics - Earth and Planetary Astrophysics - Abstract
The $Herschel$ Space telescope carried out an unprecedented survey of nearby stars for debris disks. The dust present in these debris disks scatters and polarizes stellar light in the visible part of the spectrum. We explore what can be learned with aperture polarimetry and detailed radiative transfer modelling about stellar systems with debris disks. We present a polarimetric survey, with measurements from the literature, of candidate stars observed by DEBRIS and DUNES $Herschel$ surveys. We perform a statistical analysis of the polarimetric data with the detection of far-infrared excess by $Herschel$ and $Spitzer$ with a sample of 223 stars. Monte Carlo simulations were performed to determine the effects of various model parameters on the polarization level and find the mass required for detection with current instruments. Eighteen stars were detected with a polarization $0.01 \le P \lesssim 0.1$ per cent and $\ge3\sigma_P$, but only two of them have a debris disk. No statistically significant difference is found between the different groups of stars, with, without, and unknown status for far-infrared excess, and presence of polarization. The simulations show that the integrated polarization is rather small, usually $< 0.01$ per cent for typical masses detected by their far-infrared excess for hot and most warm disks. Masses observed in cold disks can produce polarization levels above $0.01$ per cent since there is usually more dust in them than in closer disks. We list five factors which can explain the observed low-polarization detection rate. Observations with high-precision polarimeters should lead to additional constraints on models of unresolved debris disks., Comment: Corrected some quotations and typos and deleted superfluous references. 20 pages, 5 figures
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- 2018
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3. A Young Ultramassive White Dwarf in the AB Doradus Moving Group
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Gagné, Jonathan, Fontaine, Gilles, Simon, Amélie, and Faherty, Jacqueline K.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
We use Gaia DR2 kinematic data and white dwarf evolutionary models to determine that the young and ultramassive white dwarf GD 50 is a likely member of the AB Doradus moving group. Comparison with the Montr\'eal white dwarf evolutionary models and the MIST main-sequence lifetimes imply a total age of 117 $\pm$ 26 ($\pm$ 13 statistic, $\pm$ 22 systematic) Myr, accounting for all possible C/O/Ne core compositions and using the Pleiad white dwarf LB 1497 as a comparison benchmark. This is the first white dwarf cosmochronology age for a nearby young moving group, and allows us to refine the age of the AB Doradus moving group at 133$_{-20}^{+15}$ Myr by combining it with its independent isochronal age. GD 50 is the first white dwarf member of the AB Doradus moving group and is located at only 31 pc from the Sun, making it an important benchmark to better understand the star-formation history of the Solar neighborhood., Comment: Accepted for publication in ApJ letters. 8 pages, 3 figures, 1 table
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- 2018
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4. Transient Climate Response to Arctic Sea Ice Loss with Two Ice-Constraining Methods
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Simon, Amélie, Gastineau, Guillaume, Frankignoul, Claude, Rousset, Clément, and Codron, Francis
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- 2021
5. An Observational Estimate of the Direct Response of the Cold-Season Atmospheric Circulation to the Arctic Sea Ice Loss
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Simon, Amélie, Frankignoul, Claude, Gastineau, Guillaume, and Kwon, Young-Oh
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- 2020
6. MagAO Imaging of Long-period Objects (MILO). II. A Puzzling White Dwarf around the Sun-like Star HD 11112
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Rodigas, Timothy J., Bergeron, P., Simon, Amelie, Arriagada, Pamela, Faherty, Jackie, Anglada-Escude, Guillem, Mamajek, Eric E., Weinberger, Alycia, Butler, R. Paul, Males, Jared R., Morzinski, Katie, Close, Laird M., Hinz, Philip M., Bailey, Jeremy, Carter, Brad, Jenkins, James S., Jones, Hugh, O'Toole, Simon, Tinney, C. G., Wittenmyer, Rob, and Debes, John
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Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Solar and Stellar Astrophysics - Abstract
HD 11112 is an old, Sun-like star that has a long-term radial velocity (RV) trend indicative of a massive companion on a wide orbit. Here we present direct images of the source responsible for the trend using the Magellan Adaptive Optics system. We detect the object (HD 11112B) at a separation of 2\fasec 2 (100 AU) at multiple wavelengths spanning 0.6-4 \microns ~and show that it is most likely a gravitationally-bound cool white dwarf. Modeling its spectral energy distribution (SED) suggests that its mass is 0.9-1.1 \msun, which corresponds to very high-eccentricity, near edge-on orbits from Markov chain Monte Carlo analysis of the RV and imaging data together. The total age of the white dwarf is $>2\sigma$ discrepant with that of the primary star under most assumptions. The problem can be resolved if the white dwarf progenitor was initially a double white dwarf binary that then merged into the observed high-mass white dwarf. HD 11112B is a unique and intriguing benchmark object that can be used to calibrate atmospheric and evolutionary models of cool white dwarfs and should thus continue to be monitored by RV and direct imaging over the coming years., Comment: Accepted to ApJ on September 8, 2016. 13 pages aastex6 2-column format. Comments welcome
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- 2016
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7. Low incidence of SARS-CoV-2, risk factors of mortality and the course of illness in the French national cohort of dialysis patients
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Abbassi, Abdelhamid, Debure, Alain, Guerraoui, Abdallah, Benmoussa, Abdelatif, Hamani, Abdelaziz, Ziane, Abdelaziz, Nefti, Abdelhamid, Hadj, Abdelkader, El Amari, Abderrahim, Ghazali, Abderrahmane, Abd El Fatah Mohamed, Abo Bakr, Laradi, Achour, Ben Ahmed, Adel, Sahar, Adel, Pillet, Adele, Lacraz, Adeline, Moinat, Adnan, Massoumi, Afshin, Pardon, Agathe, Beaudoin, Agnes Caillette, Debout, Agnes Chapelet, Mariot, Agnes, Rachi, Ahmed, Afiani, Aida, Boula, Aime Remy, Jalaby, Al, Cremault, Alain, Fournier, Alain, Jeanson, Alain, Lyon, Alain, Nony, Alain, Robert, Alain, Slingeneyer, Alain, Labatide, Alanor Agnes, Sartorius, Albane Brodin, Bensman, Albert, Fournier, Albert, Ranlin, Alex, Sandor, Alex Vido, Colombo, Alexandra, Duhem, Alexandra, Stancu, Alexandra, Dufay, Alexandre, Dumoulin, Alexandre, Ebel, Alexandre, Klein, Alexandre, Martin, Alexandre, Mouneimne, Alexandre, Seidowsky, Alexandre, De Martin, Alfio, Zannier, Alfredo, Aizel, Ali, Hafi, Ali, Diddaoui, Ali Zineddine, Heyani, Alim, Mocanu, Alina, Preda, Alina, Hafi, Aline, Talaszka, Aline, Duquesne, Alyette, Amaouche, Amar, Ghemmour, Amel, Simon, Amelie, Skalli, Amina, Boukadida, Amine, Ragab Eid, Amr Ekhlas, Fedorca, Ana, Baillet, Anabelle, Poyet, Anais, Giorgita, Ancuta Bouffandeau, Ratsimbazafy, Anderson, Pruna, Andre, Argiles, Angel, Testa, Angelo, Vandooren, Ann Karolien, Jolivot, Anne, Labadens, Anne Kolko, Lataste, Anne, Maisin, Anne, Paris, Anne, Sechet, Anne, Wuillai, Anne, Heng, Anne Elisabeth, Josse, Anne Gaelle, Querard, Anne Helene, Reboux, Anne Helene, Adra, Anne Laure, Faller, Anne Laure, Leclerc, Anne Laure, Poitou, Anne Laure, Manucci, Annie Lahoche, Jacquet, Antoine, Pommereau, Antoine, Thierry, Antoine, Adem, Arezki, Chapelet, Arielle, Del Bello, Arnaud, Delezire, Arnaud, Garnier, Arnaud, Guerard, Arnaud, Klisnick, Arnaud, Lionet, Arnaud, Roccabianca, Arnaud, Stolz, Arnaud, Capdeville, Arthur, Allal, Asma, Alrifai, Assem, Diarrassouba, Assetou, Djema, Assia, Carre, Assia Ferhat, Dubrasquet, Astrid Godron, Elmrabet, Atman Haddj, Jegado, Audrey, Thomas, Aurelia Bertholet, Salandre, Aurelie Davourie, Pajot, Aurelie, Lorthioir, Aurelien, Tiple, Aurelien, Sury, Aurore, Abokasem, Ayman, Sarraj, Ayman, Henaoui, Bachir, Chaghouri, Baher, Wehbe, Bassem, Ball, Beatrice, Viron, Beatrice, Issad, Belkassem, Corne, Benedicte Hodemon, Janbon, Benedicte, Deroure, Benjamin, Savenkoff, Benjamin, Jonon, Benoit, Vendrely, Benoit, Djelaleddine, Benyakoub, Ohry, Bernard, Painchart, Bernard, Strullu, Bernard, Temperville, Bernard, Ebikili, Bertin, Hacq, Bertrand, Morel, Bertrand, Aoun, Bilal, Muniz, Blanca, Chlih, Bouchra, Amara, Brahim, Mayor, Brice, Gilson, Brigitte, Llanas, Brigitte, Zins, Brigitte, Bourgeon, Bruno, Coevoet, Bruno, Guery, Bruno, Legallicier, Bruno, Paris, Bruno, Ranchin, Bruno, Seigneuric, Bruno, Dita, Camelia Ghiciuc, Prelipcean, Camelia, Hottelart, Carine Achard, Diet, Carine, Frangie, Carlos, Vela, Carlos, Muresan, Carmina, Deprele, Carole, Araujo, Caroline, Bidault, Caroline, Creput, Caroline, Delclaux, Caroline, Du Halgouet, Caroline, Favennec, Caroline, Freguin, Caroline, Vercel, Caroline Gourraud, Mesguen, Caroline, Obama, Caroline Ndomo, Poitou, Caroline, Dirhold, Caroline Preissig, Roubiou, Caroline, Albert, Catherine, Bessin, Catherine, De Marion Gaja, Catherine, Godart, Catherine, Lasseur, Catherine, Leocardi, Catherine, Lumbroso, Catherine, Melander, Catherine, Michel, Catherine, Maurouard, Catherine Quere, Rouannet, Catherine, Taddei, Catherine, Verove, Cathy, Guiraud, Cecile, Tafelin, Cecile, Baron, Cecile Turc, Formet, Cedric, Pinier, Cedric, De Ste Foy, Celia Lessore, Granolleras, Celine, Bennini, Chaouki, Cartou, Charles, Chazot, Charles, Jouzel, Charlotte, Badid, Cherif, Roubicek, Christa, Viaud, Christel, Verrier, Christelle, Chuet, Christian, Combe, Christian, Dabot, Christian, Duvic, Christian, Emond, Christian, Lagarde, Christian, Lamotte, Christian, Pain, Christian, Mousson, Christiane, Lorriaux, Christie, Beauchamp, Christine, Fumeron, Christine, Le Gurun, Christine, Leroy, Christine, Pietrement, Christine, Richer, Christine, Bouaka, Christophe, Charasse, Christophe, Goupy, Christophe, Ridel, Christophe, Castrale, Cindy, Detourne, Cindy, Francois, Clair, Presne, Claire, Trivin, Claire, Von Kotze, Clarissa, Bernard, Claude, Bonniol, Claude, Desvergnes, Claude, Raharivelina, Claude, Nistor, Claudia, Gueret, Claudine, Lloret, Claudine, Saltiel, Claudine, Rosati, Clelia, Rabate, Clementine, Stanescu, Corina, Ferrandini, Corinne, Guibergia, Corinne, Lemoine, Corinne, Passeron, Corinne, Kahil, Cynthia, Garrouste, Cyril, Van, Cyril Vo, Jolimoy, Cyrille, Kesraoui, Dalila, Jolly, Damien, Thibaudin, Damien, Teboulle, Dan, Daubresse, Daniel, Louvet, Daniel, Rasamimanantsoa, Daniel, Toledano, Daniel, Babici, Daniela, David, Daniela, Dincu, Daniela, Bruno, Danielle, May, Delia, Haussaire, Delphine, Viprey, Delphine Henriet, Bugnon, Denis, Fouque, Denis, Morin, Denis, Nour, Derradji, Mahmoud, Diab Mohamed, Cristescu, Diana Istrati, Aguilera, Didier, Coste, Didier, Hamel, Didier, Le Chapois, Didier, Testou, Didier, Erbilgin, Dilaver, Dahmane, Djamal, Quang, Doan Bui, Bertrand, Dominique, Besnier, Dominique, Blanchier, Dominique, Briffa, Dominique, Caux, Dominique, Durand, Dominique, Fleury, Dominique, Guerrot, Dominique, Hestin, Dominique, Jaubert, Dominique, Joly, Dominique, Lombart, Dominique, Pagniez, Dominique, Pierre, Dominique, Schohn, Dominique, Ikonga, Donatien, Visanica, Dorina, Bazin, Dorothee, Boury, Edouard, Maksour, Edouard, Agbonon, Ekoue, Harrami, Elarbi, Marcu, Elena, Tudorache, Elena, Caniot, Elisabeth, Semjen, Elisabeth, Tomkiewicz, Elisabeth, Scheidt, Elise, Gaboriau, Elke, Lamouroux, Elodie, Guiard, Elsa, Passos, Elsa Martin, Nsembani, Emerson, Fache, Emilie, Kalbacher, Emilie, Pambrun, Emilie, Pincon, Emilie, Launay, Emma Allain, Baron, Emmanuel, Dupuis, Emmanuel, Villar, Emmanuel, Charlin, Emmanuelle, Hecquet, Emmanuelle, Kohler, Emmanuelle, Laurain, Emmanuelle, Rosier, Emmanuelle, Figueroa, Enrique, Azoulay, Eric, Canivet, Eric, Daugas, Eric, Gauthier, Eric, Laruelle, Eric, Le Guen, Eric, Legrand, Eric, Moumas, Eric, Postec, Eric, Prinz, Eric, Renaudineau, Eric, Desport, Estelle, Sutra, Estelle Ricard, Berard, Etienne, Ged, Etienne, Robin, Etienne, Vilaine, Eve, Bargas, Evelyne, Namara, Evelyne Mac, Combarnous, François, Yazbeck, Fatima, Gerard, Fabien, Metivier, Fabien, Parazols, Fabien, Soulis, Fabien, Garnier, Fabrice, Messaoudene, Fadhila Pech, Haidar, Fadi, Boullenger, Fanny, Lepeytre, Fanny, Leroy, Fanny, Frejate, Fares, Bellahsene, Farid, Bellhasene, Farid, Saidani, Farid, Toure, Fatouma, Kriaa, Faycal, Nemmar, Fazia, Vetromile, Fernando, Chalmin, Florence, Lucats, Florence, Sens, Florence, Villemain, Florence, Plasse, Florent, Lebhour, Fouad, Schillinger, Francis, Berge, Franck, Bourdon, Franck, Bridoux, Franck, Reynaud, Franck, Babinet, Francois, Basse, Francois, Chantrel, Francois, Clair, Francois, Coulomb, Francois, De Cornelissen, Francois, Glowacki, Francois, Marchal, Francois, Maurice, Francois, Nobili, Francois, Pourreau, Francois, Provot, Francois, Amani, Francois Roux, Broux, Francoise, Bulte, Francoise, Heibel, Francoise, Leonetti, Francoise, Schott, Francoise Moussion, Le Roy, Frank, Besson, Frederic, Lavainne, Frederic, Tollis, Frederic, Bocquentin, Frederique, Meeus, Frederique, Vecina, Frederique, Von Ey, Friederike, Balit, Gabriel, Choukroun, Gabriel, Gruget, Gabriel, Huchard, Gabriel, Golea, Gabriella, Duneau, Gabrielle, Lefrancois, Gaelle, Pelle, Gaelle, Lebrun, Gaetan, Dumont, Genevieve, Brillet, Georges, Deschenes, Georges, Mourad, Georges, Stamatakis, Georges, Cazajous, Geraldine, D'ythurbide, Geraldine, Wiart, Geraldine Robitaille, Cardon, Gerard, Champion, Gerard, Deschodt, Gerard, Mangenot, Gerard, Motte, Gerard, Schortgen, Gerard, Boulahia, Ghada, Maakaroun, Ghassan, Michel, Ghylene Bourdat, Zanetta, Gilbert, Hufnagel, Gilles, Messier, Gilles, Piccoli, Giorgina, Desvergnes, Gregoire Couvrat, Bobrie, Guillaume, Bonnard, Guillaume, Clement, Guillaume, Jean, Guillaume, Queffeulou, Guillaume, Seret, Guillaume, Vernin, Guillaume, Delavaud, Guy, Lambrey, Guy, Rostoker, Guy, Poussard, Gwenaelle, Kesler, Gwenaelle Roussey, Leon, H., Aboubekr, Habib, Boulechfar, Hacene, Sekhri, Hacene, Hebibi, Hadia, Benalia, Hadjira, Fessi, Hafed, Atchia, Hafsabhai, Bittar, Haiat, Maiza, Hakim, Mazouz, Hakim, El Ali, Hamid, Bougrida, Hammouche, Van Der Pijl, Hans, Lokmane, Hassan, Izzedine, Hassane, Adda, Hassen, De Preneuf, Helene, Leray, Helene, Philippot, Helene, Boulanger, Henri, Merault, Henri, Renaud, Henri, Bonarek, Herve, Maheut, Herve, Nzeyimana, Hilaire, Mehama, Hocine, Zaidi, Hocine, Weclawiak, Hugo, Flodrops, Hugues, Karaaslan, Huseyin, Haskour, Ibrahim, Belhadj, Ihssen, Almoubarak, Imad, Haddad, Imad, Castellano, Ines, Ferrandiz, Ines, Daniliuc, Ioana, Darie, Ioana, Enache, Ioana, Prunescu, Ionut, Djiconkpode, Irenee, Shahapuni, Irina, Bouchoule, Isabelle, Devriendt, Isabelle, Kazes, Isabelle, Kolb, Isabelle, Landru, Isabelle, Poli, Isabelle, Rey, Isabelle, Segalen, Isabelle, Selcer, Isabelle, Vernier, Isabelle, Vrillon, Isabelle, Guenifi, Ismahane, Gheerbrandt, J. Dominique, Potier, Jacky, Becart, Jacques, Cledes, Jacques, Ducros, Jacques, Duvic, Jacques, Fourcade, Jacques, Gaultier, Jacques, Jurine, Jacques, Lebleu, Jacques, Ollier, Jacques, Charles, Jacques Ibsen, Yazji, Jamal, Mansour, Janette, Arnautou, Jean, Brocard, Jean, Carolfi, Jean, Montoriol, Jean, Gouin, Jean Baptiste, Palcoux, Jean Bernard, Bendini, Jean Christophe, Aldigier, Jean Claude, Alphonse, Jean Claude, Delbet, Jean Daniel, Bonne, Jean Francois, Cantin, Jean Francois, De Fremont, Jean Francois, Dessassis, Jean Francois, Subra, Jean Francois, Valentin, Jean Francois, Verdier, Jean Francois, Dion, Jean Jacques, Haultier, Jean Jacques, Montseny, Jean Jacques, Bacri, Jean Louis, Bouchet, Jean Louis, Mahe, Jean Luc, Chalopin, Jean Marc, Gabriel, Jean Marc, Hurot, Jean Marc, Lanau, Jean Marc, Batho, Jean Marie, Coulibaly, Jean Marie, Hardin, Jean Michel, Marc, Jean Michel, Poux, Jean Michel, Rebibou, Jean Michel, Tivollier, Jean Michel, Ottavioli, Jean Noel, Faucon, Jean Paul, Imiela, Jean Paul, Jaulin, Jean Paul, Masselot, Jean Paul, Ortiz, Jean Paul, Bourdenx, Jean Philippe, Devaux, Jean Philippe, Hammelin, Jean Philippe, Rivory, Jean Pierre, Wauquier, Jean Pierre, Larue, Jean Rene, Mondain, Jean Rene, Borde, Jean Sebastien, Virot, Jean Simon, Bosc, Jean Yves, Achiche, Jedjiga, Parasote, Jennifer, Diolez, Jeremie, Harambat, Jerome, Potier, Jerome, Sampol, Jerome, Mustel, Jihad, Lefevre, Jean Jacques, Maurizi, Jocelyne, Gamberoni, Joel, Claudeon, Joelle, Terzic, Joelle, Rogol, Joffrey, Sayegh, Johnny, Cardozo, Jorge, Brasseur, Jose, Guiserix, Jose, Barsumau, Joseph, Albaret, Julie, Beaume, Julie, Attias, Julie Sohier, Dehay, Julien, Hogan, Julien, Journet, Julien, Ott, Julien, Baleynaud, Juliette, Bacchetta, Justine, Faucher, Justine, Yousfi, Kamel, Dardim, Karim, Clabault, Karine, Moreau, Karine, Thomas, Kedna, Sirajedine, Khaled, Chedid, Khalil, El Kaeoui, Khalil, El Karoui, Khalil, Bouachi, Khedidja, Hue, Kheira, El Nasser, Khuzama, Akposso, Kodso, Kunz, Kristian, Bijak, Krzysztof, Kihal, Lilia, Rasoloarijaona, L., Harbouche, Laid, Bencheikh, Larbi, Lamriben, Larbie, Hanafi, Latifa, Parvez, Laura Braun, Champion, Laure, Croze, Laure, Eprinchard, Laure, Patrier, Laure, Nicolet, Laurence, Vrigneaud, Laurence, Duflot, Laurent, Mackaya, Leandre, Chenine, Leila, Odry, Leon, Tamiji, Lili Taghipour, Bouzar, Lilia Antri, Nga Messi, Liliane Ngango, Le Mouellic, Lionel, Mandart, Lise, Weis, Lise, Pouteau, Lise Marie, Georgieva, Lora, Vitanova, Lorita, Chalabi, Lotfi, Delvallez, Luc, Frimat, Luc, Fromentin, Luc, Marty, Luc, Monjot, Luc, Spataru, Luciana, Bessenay, Lucie, Boissinot, Lucie, Wajsbrot, Lucie, Rakoff, Lucien, Lebourg, Ludivine, Perez, Lydie, Lafage, Lyliane, Azzouz, Lynda, Dumoulin, Madeleine, Ouziala, Messaoud, Joseph, Maan, Brahimi, Mabrouk, Fat, Maeva Wong, Fort, Magalie, Nakhla, Magued, Abtahi, Mahdi, Albadawy, Mahen, Alouach, Mahmoud, Mezghani, Mahmoud, Daroux, Maite, Boukelmoune, Maklouf, Dhib, Malek, Touam, Malik, Dubau, Malina, Balde, Mamadou, Khoa, Man Nguyen, Ismer, Manfred, Mehdi, Manolie, Laforet, Manon, Bouiller, Marc, Eugene, Marc, Fila, Marc, Hazzan, Marc, Kribs, Marc, Ladriere, Marc, Lebot, Marc, Padilla, Marc, Souid, Marc, Marraoui, Marcel, Burbach, Maren, Manescu, Maria, Noguera Gonzalez, Maria Eugenia, Revenco, Mariana, Terrasse, Marianne, Essi, Marie, Macher, Marie Alice, Nogier, Marie Beatrice, Cazin, Marie Cecile, Schweitzer Camoin, Marie Christine, Thouret, Marie Christine, Hannaert, Marie Claude, Servel, Marie France, Chabannier, Marie Helene, Coudert Krier, Marie Jeanne, Catoliquot, Marie Noelle, Guillodo, Marie Paule, Gavard, Marie Sophie, Vairon Codaccioni, Marie Xaviere, Rabec, Marina, Freist, Marine, Gauthier, Marion, Lemaire, Marion, Mehrenberger, Marion, Venot, Marion, Pongas, Marios, Diant, Marlene Beaubrun, Levannier, Martial, Bertaux, Martine, Jablonski, Mathieu, Sacquepee, Mathieu, Dargelos, Mathilde, Lemoine, Mathilde, Tamain, Mathilde, Monge, Matthieu, Reberolle, Matthieu, Cousin, Maud, Francois, Maud, Baron, Maurice, Hoffmann, Maxime, Ingwiller, Maxime, Touzot, Maxime, Mohajer, Mederick, Maaz, Mehadji, Hanoy, Melanie, Marroc, Melanie, Cuny, Melodie, Van Der Straaten, Menno, Serveaux, Mf., Basteri, Michel, Chong, Michel Fen, Hecht, Michel, Massad, Michel, Normand, Michel, Olmer, Michel, Tolani, Michel, Tsimaratos, Michel, Hemery, Michele, Kessler, Michele, Esposito, Miguel, Shenouda, Milad, Kareche, Mimi, Khalili, Mina, Diaconita, Mirella, Rifard, Mohamad Khair, Aladib, Mohamed, Belmouaz, Mohamed, Brahim, Mohamed, Diouani, Mohamed, Cherif, Mohamed Fodil, Jamali, Mohamed, Maghlaoua, Mohamed, Meddeb, Mohamed, Ramdane, Mohamed, Rifaat, Mohamed, Islam, Mohamed Sharifull, Abbade, Mohamed Adnan, Amrandi, Mokhtar, Chawki, Mokhtar, Ciobotaru, Monica, Indrieis, Monica, Chanas, Monique, Hoarau, Monique, Tomeh, Monzer, Bellou, Moufida, Bouzernidj, Mouloud, Ammor, Mounia, Guergour, Mounir, Benzakour, Mountassir, Hachicha, Mourad, Coulibaly, Moussa, Smati, Mustafa, Al Morabiti, Mustapha, Amirou, Mustapha, Isnard, Myriam, Pastural, Myriam, Pujo, Myriam, Boumendjel, Nourredine, Majbri, Nabil, Goumri, Nabila, Mingat, Nadege, Bassilios, Nader, Kerkeni, Nadia, Sedrati, Nadia, Soltani, Nadia, Maroun, Nadine, Neyrat, Nadine, Luang, Nahn, El Esper, Najeh, Ammar, Naji, Ghali, Nasredine, Hamdini, Nasser, Noel, Natacha, Potelune, Natacha, Maisonneuve, Nathalie, Pertuiset, Nathalie, Raynal, Nathalie, Vittoz, Nathalie, Terki, Nazim, Castin, Nelly, Nankeu, Nestor, Bouvier, Nicolas, Keller, Nicolas, Legros, Nicolas, Peters, Nicolas, Quirin, Nicolas, Lefrancois, Nicole, Monnier, Nicole, Rance, Nicole, Bruckmann, Niels, Mertens, Noel, Lorcy, Nolwenn, Gilbert, Olivia, Coldefy, Olivier, Drouineau, Olivier, Dunand, Olivier, Fritz, Olivier, Imhoff, Olivier, Kourilsky, Olivier, Lavelle, Olivier, Moranne, Olivier, Papin, Olivier, Roques, Olivier, Le Maner, Ophelie, Benbrahim, Oussamah Fikri, Erina Torres, Pablo Antonio, Urena Torres, Pablo Antonio, Malvezzi, Paolo, Bindi, Pascal, Cluzel, Pascal, Fontanier, Pascal, Wheatley, Pascal, Depraetre, Pascale, Dubosq, Pascale, Halin, Pascale, Sebahoun, Pascale, Siohan, Pascale, Testevuide, Pascale, Deteix, Patrice, Nolen, Patrice, Hue, Patricia, Lemarchand, Patricia, Donnadieu, Patrick, Fievet, Patrick, Fohrer, Patrick, Francais, Patrick, Giraud, Patrick, Hallonet, Patrick, Henri, Patrick, Michaut, Patrick, Niaudet, Patrick, Pauly, Patrick, Thomas, Patrick, Deleaval, Patrik, Finielz, Paul, Stroumza, Paul, Yverneau, Paule Hardy, Caillard, Pauline, Palacin, Pedro, Aubertin, Perrine, Attias, Philippe, Brunet, Philippe, Chauveau, Philippe, Coindre, Philippe, Coste, Philippe, Dubot, Philippe, Fournier, Philippe, Hiernaux, Philippe, Jousset, Philippe, Yue Wah, Philippe Lan, Lang, Philippe, Le Cacheux, Philippe, Dupont, Philippe Martin, Michel, Philippe, Mirgaine, Philippe, Moriniere, Philippe, Nicoud, Philippe, Rieu, Philippe, Rousseau, Philippe, Sporer, Philippe, Thorel, Philippe, Vanhille, Philippe, Vigeral, Philippe, Zaoui, Philippe, Bataille, Pierre, Brignon, Pierre, Filipozzi, Pierre, Housset, Pierre, Peyronnet, Pierre, Ramperez, Pierre, Vautrin, Pierre, Michel, Pierre Alexandre, Westeel, Pierre Francois, Carron, Pierre Louis, Durand, Pierre Yves, Parent, Pierrot, Seniuta, Piotr, Kuentz, François, Fraoui, Rabah, Tetaz, Rachel, Amaria, Rachid, Bourouma, Rachid, Djeffal, Rachid, Nebbad, Rachida, Allal, Radia, Dimulescu, Radu, Boustani, Rafaat, Mesbah, Rafik, Makdassi, Raifat, Diab, Raji, Puslenghea, Raluca, Roura, Raoul, Khayat, Rateb, Azar, Raymond, Frayssinet, Raymond, Monkam, Regine, Boulahrouz, Rehouni, Boudet, Remi, Demontis, Renato, Gansey, Renaud, Cuvelier, Rene, Schmitt, Renee, Noordally, Reschad, Binaut, Reynald, Latif, Rezkallah, Dufresne, Richard, Montagnac, Richard, Reade, Richard, Genin, Robert, Novo, Robert, Fickl, Rocsana, Dufresne, Roger, Magnol, Roger, Issautier, Roland, Mortelette, Romain, Delaval, Ronan, Lohro, Ronan, M'barga, Roseline, Beau, S., Dupuis, Clémentine, Vidil, Marie Jacques, Hacini, Sabria, Dahmoune, Said, Lekhal, Saliha, Sakso, Salima Ahriz, Saksi, Salima, Citarda, Salvatore, Boubenider, Samir, Kassis, Samuel, Verhille, Sandra, Genestier, Sandrine, Muller, Sandrine, Krid, Saoussen, Richter, Sarah, Delbes, Sebastien, Mailliez, Sebastien, Veillon, Sebastien, Nony, Sébastien, Benarbia, Seddick, Beaudreuil, Severine, Benyaghla, Sidi Ali, Duquennoy, Simon, Baluta, Simona, Boncila, Simona, Mzoughi, Sonia, Ribal, Sonia, Acamer, Sophie, Chauvet, Sophie, Girerd, Sophie, Ozenne, Sophie, Parahy, Sophie, Duval, Sophie Rubens, Taque, Sophie, Menouer, Soraya, Chargui, Soumaya, Bataille, Stanislas, Barbier, Stephane, Billion, Stephane, Roueff, Stephane, Torner, Stephane, Martin, Stephane Jean, Coupel, Stephanie, Cloarec, Sylvie, Lavaud, Sylvie, Leou, Sylvie, Chatelet, T., Onesta, Tania, Benhabib, Tassadit, Bensalem, Tayeb, Dimulescu, Theodora, Sawadogo, Theophile, Hitze, Thibault Dolley, Baranger, Thierry, Boudemaghe, Thierry, Hannedouche, Thierry, Krummel, Thierry, Lobbedez, Thierry, Milcent, Thierry, Dervaux, Thomas, Guincestre, Thomas, Kofman, Thomas, Raphael, Thomas, Sadreux, Thomas, Ulinski, Tim, Roger, Tiphaine Guyon, Serrato, Tomas, Kofman, Tomek, Wong, Tony, Boubia, Toufik, Gbindoun, Ubald Assogba, Khuzaie, Usama, Caudwell, Valerie, Chatelet, Valerie, Crougneau, Valerie, De Precigout, Valerie, Drouillat, Valerie, Galantine, Valerie, Hugot, Valerie Granveau, Leroy, Valerie, Boubia, Veronique, Falque, Veronique, Fournier, Veronique, Queron, Veronique, Viviani, Veronique, Gueuttin, Victor, Panescu, Victor, Calonge, Victorio Menoyo, Nguyen, Viet, Allot, Vincent, Delattre, Vincent, Leduc, Vincent, Pradier, Vincent, Aglae, Violaine Emal, Badulescu, Viorica, Molina, Virginia, Besson, Virginie, Chaigne, Virginie, Jaber, Waddah, Boudi, Wael, El Haggan, Wael, Guillon, Wen Qin, Aneni, Wided Tabbi, Hanf, William, Kohn, Wladimir, Bellenfant, Xavier, Gaudry, Xavier Moreau, Delmas, Yahsou, Knefati, Yannick, Saingra, Yannick, Tirolien, Yannick, Mann, Youssef, Brunak, Yvan, Dimitrov, Yves, Doussy, Yves, Tanter, Yves, Benabid, Zaid, Soltani, Zaara, Boukerroucha, Zacharia, Takla, Zafer, Ramanantsialonina, Zana, Dickson, Zara, Tubail, Zead, Pour, Zoe Koochaki, Boukhalfa, Zohra, Jacquot, Zohra, Couchoud, Cécile, Bayer, Florian, Ayav, Carole, Béchade, Clémence, Chantrel, François, Galland, Roula, Hourmant, Maryvonne, and Mercadal, Lucile
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- 2020
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8. The marine heatwave west of Ireland in June 2023
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McCarthy, Gerard D., primary, Plecha, Sandra, additional, Charria, Guillaume, additional, Simon, Amélie, additional, Poppeschi, Coline, additional, and Russo, Ana, additional
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- 2023
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9. Editorial: Sea ice - ocean interactions
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Docquier, David, primary, Ponsoni, Leandro, additional, Simon, Amélie, additional, and Piola, Alberto R., additional
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- 2023
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10. A comparison of two causal methods in the context of climate analyses.
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Docquier, David, Di Capua, Giorgia, Donner, Reik V., Pires, Carlos A. L., Simon, Amélie, and Vannitsem, Stéphane
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EL Nino ,ARCTIC oscillation ,STATISTICAL correlation - Abstract
Correlation does not necessarily imply causation, and this is why causal methods have been developed to try to disentangle true causal links from spurious relationships. In our study, we use two causal methods, namely, the Liang–Kleeman information flow (LKIF) and the Peter and Clark momentary conditional independence (PCMCI) algorithm, and we apply them to four different artificial models of increasing complexity and one real-world case study based on climate indices in the Atlantic and Pacific regions. We show that both methods are superior to the classical correlation analysis, especially in removing spurious links. LKIF and PCMCI display some strengths and weaknesses for the three simplest models, with LKIF performing better with a smaller number of variables and with PCMCI being best with a larger number of variables. Detecting causal links from the fourth model is more challenging as the system is nonlinear and chaotic. For the real-world case study with climate indices, both methods present some similarities and differences at monthly timescale. One of the key differences is that LKIF identifies the Arctic Oscillation (AO) as the largest driver, while the El Niño–Southern Oscillation (ENSO) is the main influencing variable for PCMCI. More research is needed to confirm these links, in particular including nonlinear causal methods. [ABSTRACT FROM AUTHOR]
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- 2024
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11. Coastal and regional marine heatwaves and cold spells in the northeastern Atlantic
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Simon, Amélie, primary, Poppeschi, Coline, additional, Plecha, Sandra, additional, Charria, Guillaume, additional, and Russo, Ana, additional
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- 2023
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12. A comparison of two causal methods in the context of climate analyses.
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Docquier, David, Capua, Giorgia Di, Donner, Reik V., Pires, Carlos A. L., Simon, Amélie, and Vannitsem, Stéphane
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EL Nino ,ARCTIC oscillation ,STATISTICAL correlation - Abstract
Correlation does not necessarily imply causation, and this is why causal methods have been developed to try to disentangle true causal links from spurious relationships. In our study, we use two causal methods, namely the Liang-Kleeman information flow (LKIF) and the Peter and Clark momentary conditional independence (PCMCI) algorithm, and apply them to four different artificial models of increasing complexity and one real-case study based on climate indices in the North Atlantic and North Pacific. We show that both methods are superior to the classical correlation analysis, especially in removing spurious links. LKIF and PCMCI display some strengths and weaknesses for the three simplest models, with LKIF performing better with a smaller number of variables, and PCMCI being best with a larger number of variables. Detecting causal links from the fourth model is more challenging as the system is nonlinear and chaotic. For the real-case study with climate indices, both methods present some similarities and differences at monthly time scale. One of the key differences is that LKIF identifies the Arctic Oscillation (AO) as the largest driver, while El Niño-Southern Oscillation (ENSO) is the main influencing variable for PCMCI. More research is needed to confirm these links, in particular including nonlinear causal methods. [ABSTRACT FROM AUTHOR]
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- 2023
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13. Slowdown and Recovery of the Atlantic Meridional Overturning Circulation and a Persistent North Atlantic Warming Hole Induced by Arctic Sea Ice Decline
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Ferster, Brady S., primary, Simon, Amélie, additional, Fedorov, Alexey, additional, Mignot, Juliette, additional, and Guilyardi, Eric, additional
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- 2022
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14. Pacific Decadal Oscillation modulates the Arctic sea-ice loss influence on the midlatitude atmospheric circulation in winter
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Simon, Amélie, primary, Gastineau, Guillaume, additional, Frankignoul, Claude, additional, Lapin, Vladimir, additional, and Ortega, Pablo, additional
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- 2022
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15. Attention Deficit Hyperactivity Disorder : what are the relationships with Gaming Disorder Symptoms and the motivations to play?
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Chauchard, Emeline, primary, Simon, Amélie, additional, Boudoukha, Abdel-Halim, additional, Galan, Clémentine, additional, Rouzo, Stevens, additional, Penthier, Lou, additional, and Moreau, Axelle, additional
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- 2022
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16. Letter from the French-speaking Association of Trauma and Dissociation on the case of Shaïna, a victim of sexual and gender-based violence in her home housing project, and a lack of understanding within the justice system
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Binet, Éric, primary, Faraüs, Emmanuel, additional, Lorent, Thibaut, additional, Obin, Sophie Le Quillec, additional, Mazaira, Sandra, additional, Boucher, Christilla, additional, Roy, Dr Isabelle, additional, Simon, Amélie, additional, Soubelet, Andrea, additional, Tarquinio, Professor Cyril, additional, and Wisler, Déborah, additional
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- 2022
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17. Lettre de l'Association Francophone du Trauma et de la Dissociation, suite au calvaire de Shaina, victime des violences sexistes et sexuelles de sa cité, et de la méconnaissance de la justice
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Binet, Dr Éric, primary, Faraüs, Emmanuel, additional, Lorent, Thibaut, additional, Obin, Sophie Le Quillec, additional, Mazaira, Sandra, additional, Boucher, Christilla, additional, Roy, Dr Isabelle, additional, Simon, Amélie, additional, Soubelet, Andrea, additional, Tarquinio, Professeur Cyril, additional, and Wisler, Déborah, additional
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- 2022
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18. Coastal and regional marine heatwaves and cold-spells in the Northeast Atlantic.
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Simon, Amélie, Poppeschi, Coline, Plecha, Sandra, Charria, Guillaume, and Russo, Ana
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MARINE heatwaves ,OCEAN temperature ,HEAT waves (Meteorology) ,TEMPERATURE measurements - Abstract
The latest IPCC report describes an increase in the number and intensity of marine heatwaves (MHWs) and a decrease in marine cold-spells (MCSs) in the global ocean. However, these reported changes are not uniform on a regional to local basis and it remains unknown if coastal areas follow the open ocean trends. Ocean temperature measurements collected by satellites (from 1982–2022) and 13 coastal buoys (from 1990–2022) are analyzed in the Northeast Atlantic and three subregions: English Channel, Bay of Brest and Bay of Biscay. The activity metric, combining the number of events, intensity, duration and spatial extent, is used to evaluate the magnitude of these extreme events. The results from in situ and satellite datasets for each of the studied regions are quite in agreement, although the satellite dataset underestimates the amplitude of activity for both MHW and MCS. This supports the applicability of the method to both in situ and satellite data, albeit with caution on the amplitude of these events. Also, this localized study in European coastal Northeast Atlantic water highlights that similar changes are being seen in coastal and open oceans regarding extreme events of temperature, with MHWs being more frequent, longer, and extending over larger areas, while the opposite is seen for MCSs. These trends are explained by changes in both the mean and variance of sea-surface temperature. Besides, the pace of evolution and dynamics of marine extreme events differs among the subregions. The English Channel is the region experiencing the most drastic changes over the last four decades. Summer marine heatwaves were very active in the English Channel in 2022 due to long events, in the Bay of Biscay in 2018 due to intense events and in the Bay of Brest in 2017 due to a high occurrence of events. Winter MCSs were the largest in 1987 and 1986 due to long and intense events in the English Channel. Finally, our findings suggest that at an interannual time scale, having dominant high-pressure conditions over Northern Europe and a low off the Iberian Peninsula favor the generation of strong summer MHWs in the Northeast Atlantic, while the opposite situation in winter dominates for MCSs. [ABSTRACT FROM AUTHOR]
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- 2023
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19. Pacific Decadal Oscillation modulates the Arctic sea-ice loss influence on the mid-latitude atmospheric circulation in winter
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Simon, Amélie, primary, Gastineau, Guillaume, additional, Frankignoul, Claude, additional, Lapin, Vladimir, additional, and Ortega, Pablo, additional
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- 2022
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20. La place du livre de jeunesse dans les pratiques professionnelles des assistants maternels
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Simon, Amélie, Institut national supérieur du professorat et de l'éducation - Académie de Besançon (INSPÉ Besançon), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), INSPE Université de Franche-Comté (Besançon), and Sylvie Meyer
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apprentissage de la langue ,[SHS.EDU]Humanities and Social Sciences/Education ,formation professionnelle ,petite enfance ,littérature de jeunesse ,découverte du livre - Abstract
La littérature de jeunesse a connu un essor important au XXe siècle. Cela a eu plusieurs conséquences : des enfants sont baignés dans les livres dès leur plus jeune âge, les ouvrages de littérature de jeunesse sortent de l’école et des scientifiques s’intéressent à ce domaine. Ces recherches montrent que les enfants sont naturellement attirés par les ouvrages de littérature de jeunesse mais que cet engouement doit être entretenu par l’adulte les accompagnant dans leur développement. Les lectures permettent notamment aux enfants de développer des compétences langagières et linguistiques, compétences les amenant progressivement à devenir lecteurs. Ces constats montrent qu’il devient nécessaire de former les professionnels de la petite enfance, et notamment les assistants maternels, à la littérature de jeunesse. Les textes officiels cadrant la formation à l’agrément d’assistant maternel prévoient une formation sur le développement et l’éveil de l’enfant. Il est en de même pour la formation reçue localement en Haute-Saône. Cependant, cette formation initiale de 120 heures ne permet pas à ces professionnels d’avoir suffisamment d’outils pour réinvestir leurs connaissances sur le livre et sur son rôle dans le développement de l’enfant dans leur pratique quotidienne. De fait, les activités proposées aux enfants par les assistants maternels ne permettent d’acquérir de compétences que lexicales et non syntaxiques et textuelles.
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- 2021
21. Pacific Decadal Oscillation modulates the Arctic sea-ice loss influence on the mid-latitude atmospheric circulation in winter.
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Simon, Amélie, Gastineau, Guillaume, Frankignoul, Claude, Lapin, Vladimir, and Ortega, Pablo
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OSCILLATIONS ,TROPOSPHERE ,POLAR vortex ,SEA ice ,STRATOSPHERE - Abstract
The modulation of the winter impacts of Arctic sea ice loss by the Pacific Decadal Oscillation (PDO) is investigated in the IPSL-CM6A-LR ocean-atmosphere general circulation model. Ensembles of simulations are performed with constrained sea ice concentration corresponding to pre-industrial, present-day and future states, and initial conditions sampling warm and cold phases of the PDO. Using a general linear model, we estimate the simulated winter impact of sea ice loss, PDO and their combined effects. In response to sea ice loss, the Arctic lower troposphere warms and a negative North-Atlantic oscillation like pattern appears together with a weak deepening of the Aleutian Low. The two patterns are associated with a weakening of the poleward flank of the eddy-driven jet, while in the stratospheric the polar vortex weakens. Besides, a warm PDO phase induces a large positive Pacific North America pattern, as well as a small negative Arctic oscillation pattern associated with a weakening of the stratospheric polar vortex. However, the effects of PDO and Arctic sea ice loss are not additive. The Arctic sea ice teleconnections in both troposphere and stratosphere are reduced by the PDO, most importantly in the stratosphere. The results are discussed and compared to those obtained with the same model in atmosphere-only simulations, where sea ice loss does not significantly alter the stratospheric polar vortex. [ABSTRACT FROM AUTHOR]
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- 2022
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22. A case of sulphasalazine-induced DRESS syndrome with delayed acute interstitial nephritis
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Augusto, Jean-François, Sayegh, Johnny, Simon, Amélie, Croue, Anne, Chennebault, Jean-Marie, Cousin, Maud, and Subra, Jean-François
- Published
- 2009
23. Identification of key processes in bridging the Arctic warming impact and its variation on decadal timescale (D3.2)
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Manzini, Elisa, Ghosh, Rohit, Matei, Daniela, Gastineau, Guillaume, Simon, Amélie, Kwon, Young-Oh, and Yang, Shuting
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13. Climate action - Abstract
Summary: Observational analysis of the Arctic warming impacts: The key driver bridging the winter Arctic warming (1980 to 2014) impact to the Northern Hemisphere has been identified, my means of an advanced multi-variable statistical analysis, to be a tropospheric pathway, linking interannual variability in Arctic warming to the Northern Hemisphere lower atmosphere variability with one month lag. Clearly, the analysis has shown, that the response to the pan-Arctic sea-ice changes does not involve the stratosphere. A covariation of sea-ice variability with Siberian snow cover may be responsible of previously proposed pathways of influences involving the stratosphere. In addition, the analysis suggests that the mechanism of the tropospheric pathway may include the intensification of the Ural anticyclone. Coordinated experiments on Arctic warming impact and its variation on decadal timescale: Warm Arctic Cold Eurasia in winter surface air temperature. Making use of the ensembles of atmospheric model experiment with and without Arctic sea ice forcing it has emerged that the large scale pattern of winter surface air temperature variability is an internal mode of atmospheric variability. At shorter time scales (interannual) the project models capture this internal mode of atmospheric variability. At longer time scales (multi-annual, decadal), however, the models fail to capture the variability/trend of the winter surface air temperature (over 1980-2014). Arctic sea-ice driven variability. Within the Arctic Circle, the sea-ice driven variability explains about 3% of the total variance for sea level pressure and about 23% for surface air temperature in boreal winter at interannual and longer time scales. Regionally, the sea-ice driven variability is 1-1.5 times as large as the variability driven by the other forcings over the Arctic and northern Eurasia. Contrasting Summer and Winter Impact of Arctic sea-ice loss. Large scale features of atmospheric circulation trends over the period 1980-2014 are not reproduced by models, both in winter and summer. While in winter internal atmospheric variability likely plays a role, the difference in summers may point to structural model deficiencies. Multidecadal variability in sea surface temperatures and Arctic warming. The role of variations of the Pacific Ocean surface temperatures on Arctic warming and its impacts many be hard to be identified, given that preliminary results suggest sensitivity to structural model differences.
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- 2019
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24. Modelling and simulation for liquid films in steam turbines
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Simon, Amélie, Laboratoire de Mecanique des Fluides et d'Acoustique ( LMFA ), École Centrale de Lyon ( ECL ), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ), EDF ( EDF ), EDF R&D (CIFRE), Ecole Centrale Lyon, Michel Lance(michel.lance@ec-lyon.fr), Simon, Amélie, Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and EDF (EDF)
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film mince tombant ,hyperbolicity ,déposition de goutte ,analyse de stabilité linéaire ,linear stability analysis ,wave propagation ,rotation ,Riemann problem ,sheared film ,tension de surface ,entropie ,volume fini ,hyperbolicité ,surface tension ,free surface ,[PHYS.MECA.MEFL] Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] ,[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] ,équations de Saint-Venant ,film cisaillé ,thin falling film ,surface libre ,[ PHYS.MECA.MEFL ] Physics [physics]/Mechanics [physics]/Mechanics of the fluids [physics.class-ph] ,Von Neumann ,Shallow-Water equations ,droplet deposition ,propagation de vagues ,problème de Riemann ,entropy ,finite volume - Abstract
In the electricity production, one central key to reduce damages and losses due to wetness in steam turbines is the study of liquid films. These thin films are created by the deposition of droplets and are highly sheared. This film may then be atomized into coarse water. At the moment, no comprehensive and validated model exists to describe this phenomenon. A 2D model based on a integral formulation associated with closure laws is developed to represent this film. Compared to classical Shallow-Water equation, the model takes into account additional effect : mass transfer, droplet impact, shearing at the free surface, surface tension, pressure gradient and the rotation. The model properties (hyperbolicity, entropy, conservativity, linear stability, Galilean invariance and rotational invariance) has been analyzed to judge the pertinence of the model. A new 2D code is implemented in a free module of the code EDF Code_Saturne and a finite volume method for unstructured mesh has been developed. The verification of the code is then carried out with analytical solutions including a Riemann problem. The model, which degenerates into classical Shallow-Water equations for the case of a falling liquid film on a inclined plane, is validated by the experiment of Liu and Gollub, 1994, PoF and compared to reference models (Ruyer-Quil and Manneville, 2000, EPJ-B et Lavalle, 2014, PhD thesis). Another study depicts a sheared film under low-pressure steam turbine conditions and is validated by the experiment of Hammitt et al., 1981, FiI. Lastly, the code film is coupled to 3D steam data around a fixed blade of a BP100 turbine, from Blondel, 2014, PhD thesis. This industrial application shows the feasibility of liquid film's simulation in real steam turbine condition., Dans la production d'électricité, un des leviers centraux pour réduire les détériorations et les pertes causées par l'humidité dans les turbines à vapeur est l'étude des films liquides. Ces films minces, sont crées par la déposition de gouttes et sont fortement cisaillés. Des gouttes peuvent ensuite être arrachées du film. A l'heure actuelle, aucun modèle complet et validé n'existe pour décrire ce phénomène. Un modèle 2D à formulation intégrale associé à des lois de fermetures a été dérivé pour représenter ce film. Comparé aux équations classiques de Saint-Venant, le modèle prend en compte davantage d'effets: le transfert de masse, l'impact des gouttes, le cisaillement à la surface libre, la tension de surface, le gradient de pression et la rotation. Une analyse des propriétés du modèle (hyperbolicité, entropie, conservativité, analyse de stabilité linéaire, invariance par translation et par rotation) est réalisée pour juger de la pertinence du modèle. Un nouveau code 2D est implémenté dans un module de développement libre du code EDF Code_Saturne et une méthode de volumes finis pour un maillage non-structuré a été développée. La vérification du code est ensuite effectuée avec des solutions analytiques dont un problème de Riemann. Le modèle, qui dégénère en modèle classique de Saint-Venant pour le cas d'un film tombant sur un plan inclinée, est validé par l'expérience de Liu and Gollub, 1994, PoF et comparé à des modèles de références (Ruyer-Quil and Manneville, 2000, EPJ-B et Lavalle, 2014, PhD thesis). Un autre cas d'étude met en scène un film cisaillé en condition basse-pression de turbine à vapeur et, est validé par l'expérience de Hammitt et al., 1981, FiI. Enfin, le code film est couplé aux données 3D du champ de vapeur autour d'un stator d'une turbine basse-pression du parc EDF, issues de Blondel, 2014, PhD thesis. Cette application industrielle montre la faisabilité d'une simulation d'un film en condition réelle du turbine à vapeur.
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- 2017
25. Ann Hader, kazeten al labourerien-douar e Breiz-Izel : un journal agricole entre modernité et tradition au début du XXe siècle
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Simon, Amélie, Université de Bretagne Occidentale - UFR Lettres et sciences humaines (UBO UFR LSH), Université de Brest (UBO), and Ronan Calvez
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Saig ar Gall (1882-1975) ,Agriculture ,Le Sillon (France) ,Encyclique Mirari vos ,Marc Sangnier (1873-1950) ,Démocrate socialiste ,Bretagne -- France ,Léon -- France ,[SHS]Humanities and Social Sciences - Abstract
Ann Hader, kazeten al labourerien-douar e Breiz-Izel est une revue bretonne du début du vingtième siècle, plus précisément de l'année 1909-1910. Ce journal est lié au mouvement du Sillon, très largement suivi en Bretagne au début de ce siècle. Le rédacteur en chef du Journal, Francis Bellec, tiendra d’ailleurs une relation épistolaire avec Marc Sangnier, leader du parti. Saig ar Gall (créateur de la coopérative La Léonarde) et Louis Le Dissès (président du syndicat agricole de Saint-Pol-de-Léon) feront d’ailleurs parti des rédacteurs. Le journal n'aura pas le temps de marquer l'histoire de la presse, et pour cause : seulement un an après le premier numéro le journal décide de mettre un terme au mensuel. Le Sillon est condamné le 25 août 1910 par le Pape et la revue annonce donc la fin du périodique le mois d'octobre suivant sans avoir publié le mois de septembre en signe de soumission à l’Église. Ce qui est marquant au sein d'Ann Hader c'est le désir de vouloir changer le monde agricole, de le faire évoluer, et de l'amener vers le syndicalisme. Il y a un réel projet derrière la rédaction des articles : améliorer la communauté paysanne. Ce journal est donc un moyen de percevoir l'agriculture bretonne de l'époque et les mouvances politiques et sociales qui gravitent autour. Cette recherche s'appuie essentiellement sur l'analyse de journaux qui devait permettre de déterminer s'il y avait bien une différence entre le discours voulu et le discours réel. L'exploitation de ces sources devait permettre de répondre à une série d'interrogations inhérentes au sujet : quel est le discours ? Comment est faite cette revue ? Pourquoi ce discours ?
- Published
- 2018
26. How to constrain the Arctic Sea Ice with a coupled model ?
- Author
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Simon, Amélie
- Subjects
Physics::Space Physics ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astrophysics::Earth and Planetary Astrophysics ,Physics::Atmospheric and Oceanic Physics ,Physics::Geophysics - Abstract
How to constrain the Arctic Sea Ice with a coupled model ?
- Published
- 2018
- Full Text
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27. Étude de l'influence de la composition du cœur des naines blanches sur le calcul des âges
- Author
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Simon, Amélie and Fontaine, Gilles
- Subjects
étoiles : naines blanches ,stars: luminosity function ,Galaxie : voisinage solaire ,stars: white dwarfs ,amas ouverts et associations : individuel (NGC 6791) ,étoiles : évolution ,étoiles : intérieur ,open clusters and associations: individual (NGC 6791) ,stars: interiors ,globular clusters: individual (47 Tucanae, M4, NGC 6397) ,stars: evolution ,étoiles : fonction de luminosité ,amas globulaires : individuel (47 Tucanae, M4, NGC 6397) ,Galaxy: solar neighborhood - Abstract
Cette thèse étudie l'impact de l'incertitude sur la composition du cœur des naines blanches sur le calcul des âges par cosmochronologie de naines blanches. Pour ce faire, nous utilisons des séquences évolutives de naines blanches pour créer les fonctions de luminosité théoriques. Nous extrapolons les séquences évolutives de naines blanches à atmosphère d'hélium aux basses luminosités, où l'opacité de l'hélium est inconnue. Nous étudions l'impact sur le calcul des âges des incertitudes sur la composition du cœur des naines blanches, sur l'extrapolation des naines blanches à atmosphère d'hélium, sur la taille de l'enveloppe des naines blanches à atmosphère d'hydrogène, sur le choix de la relation que lie la masse de l'étoile parente à la masse de la naine blanche et de la relation qui lie temps passé par l'étoile sur la séquence principale à sa masse. Nous concluons que l'incertitude sur la composition du cœur domine l'incertitude sur les âges déterminés en utilisant les naines blanches. Nous utilisons la fonction de luminosité observée de l'amas M67, combinée à son âge connu précisément, pour déterminer la composition moyenne du coeur des naines blanches dans cet amas. Nous trouvons que la composition moyenne la plus probable du cœur des naines blanches dans M67 est de 70% de carbone et de 30% d'oxygène, mais les autres compositions de cœur restent plausibles. Nous déterminons l'âge du voisinage solaire en comparant les fonctions de luminosité observée et théorique, nous obtenons un âge de 9.3 Ga (incertitude négative : 0.8 Ga, incertitude positive : 1.1 Ga, erreurs à 68% de confiance statistique), où les incertitudes sont dominées par l'incertitude sur la composition du cœur des naines blanches et dans une moindre mesure, par la taille de l'échantillon. Nous déterminons ensuite les âges de quatre amas. Nous trouvons des âges cohérents avec ceux déterminés par d'autres équipes qui utilisent aussi les séquences évolutives de naines blanches. Les incertitudes que nous déterminons prennent en compte l'incertitude sur la composition du coeur des naines blanches, qui dominent les incertitudes et celles sur la distance, qui ont aussi un impact non négligeable. Les âges déterminés par le point de décrochage de la séquence principale sont cohérents avec ceux que nous déterminons, excepté pour NGC 6791, cependant cet amas a une fonction de luminosité particulière qui suggère que son histoire n'est pas encore bien comprise. Nous concluons que la cosmochronologie de naines blanches est une technique très prometteuse mais que l'incertitude sur la composition du cœur des naines blanches fait présentement obstacle à l'obtention d'âges précis., The goal of this thesis is to quantify the impact of the uncertainty of white dwarf core composition on the computation of ages using white dwarf cosmochronology. To this end, we use white dwarf evolutionary sequences in order to build theoretical luminosity functions. We extrapolate the helium atmosphere white dwarf evolutionary sequences to low luminosity, where the helium opacity is unknown. We study the impact on the computed ages of the uncertainties associated with the white dwarf core composition, the extrapolation of the helium atmosphere evolutionary sequences, the thickness of the hydrogen envelope, the choice of the inital-final mass relation used and the choice of the relation used that links the time spent on the main sequence to the mass of the star. We come to the conclusion that the uncertainty on the core composition dominates the uncertainty on the ages when we use white dwarfs. We then use the observed luminosity function of the globular cluster M67, combined with a precise measurements of its age, in order to determine the mean core composition of white dwarfs in this cluster. We find that the most probable core composition is 70% carbon and 30% oxygen but we can not rule out other compositions. We determine the age of the solar neighbourhood by comparing its observed luminosity function to our theoretical ones. We obtain an age of 9.3 Gyr (negative uncertainty: 0.8 Ga, positive uncertainty: 1.1 Ga, errors at 68% of confidence level), where the uncertainty is dominated by the uncertainty on the core composition and to a lesser extent by the uncertainty on the size of the sample. We then determine the ages of four clusters. We find ages consistents with the ones determined by other teams that also use white dwarf evolutionary sequences. The uncertainty that we determine takes into account the uncertainty on the white dwarf core composition, that dominates the uncertainty on the inferred age, and the ones on distance, that also have a non-negligeable impact. The ages determined by the main sequence turn-off are consistent with the ones we find, except for NGC 6791. However, this cluster has a peculiar white dwarf luminosity function, suggesting its history is not well understood. We conclude that white dwarf cosmochronology is a very promising technique to infer ages but the uncertainty on core composition is an obstacle to obtaining precise ages.
- Published
- 2018
28. Polarization of stars with debris discs: comparing observations with models
- Author
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Vandeportal, Julien, primary, Bastien, Pierre, additional, Simon, Amélie, additional, Augereau, Jean-Charles, additional, and Storer, Émilie, additional
- Published
- 2018
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29. PhD defense Amélie Simon
- Author
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Simon, Amélie
- Published
- 2017
- Full Text
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30. A Young Ultramassive White Dwarf in the AB Doradus Moving Group
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Gagné, Jonathan, primary, Fontaine, Gilles, additional, Simon, Amélie, additional, and Faherty, Jacqueline K., additional
- Published
- 2018
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31. Development of a model for thin films and numerical sensitivity tests
- Author
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Simon, Amélie, primary, Dorey, Jean-Marc, additional, and Lance, Michel, additional
- Published
- 2018
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32. MagAO IMAGING OF LONG-PERIOD OBJECTS (MILO). II. A PUZZLING WHITE DWARF AROUND THE SUN-LIKE STAR HD 11112
- Author
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Rodigas, Timothy J., primary, Bergeron, P., additional, Simon, Amélie, additional, Arriagada, Pamela, additional, Faherty, Jacqueline K., additional, Anglada-Escudé, Guillem, additional, Mamajek, Eric E., additional, Weinberger, Alycia, additional, Butler, R. Paul, additional, Males, Jared R., additional, Morzinski, Katie, additional, Close, Laird M., additional, Hinz, Philip M., additional, Bailey, Jeremy, additional, Carter, Brad, additional, Jenkins, James S., additional, Jones, Hugh, additional, O’Toole, Simon, additional, Tinney, C. G., additional, Wittenmyer, Rob, additional, and Debes, John, additional
- Published
- 2016
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33. Polarization of stars with debris discs: comparing observations with models.
- Author
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Vandeportal, Julien, Bastien, Pierre, Simon, Amélie, Augereau, Jean-Charles, and Storer, Émilie
- Subjects
STARS ,OPTICAL polarization ,ASTRONOMICAL observations ,POLARIMETRY - Abstract
The Herschel Space telescope carried out an unprecedented survey of nearby stars for debris discs. The dust present in these debris discs scatters and polarizes stellar light in the visible part of the spectrum. We explore what can be learned with aperture polarimetry and detailed radiative transfer modelling about stellar systems with debris discs. We present a polarimetric survey, with measurements from the literature, of candidate stars observed by DEBRIS and DUNES Herschel surveys. We perform a statistical analysis of the polarimetric data with the detection of far-infrared excess by Herschel and Spitzer with a sample of 223 stars. Monte Carlo simulations were performed to determine the effects of various model parameters on the polarization level and find the mass required for detection with current instruments. Eighteen stars were detected with a polarization 0.01 ≤ P ≲ 0.1 per cent and ≥3σ
P , but only two of them have a debris disc. No statistically significant difference is found between the different groups of stars, with, without, and unknown status for far-infrared excess, and presence of polarization. The simulations show that the integrated polarization is rather small, usually <0.01 per cent for typical masses detected by their far-infrared excess for hot and most warm discs. Masses observed in cold discs can produce polarization levels above 0.01 per cent since there is usually more dust in them than in closer discs. We list five factors which can explain the observed low-polarization detection rate. Observations with high-precision polarimeters should lead to additional constraints on models of unresolved debris discs. [ABSTRACT FROM AUTHOR]- Published
- 2019
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34. A Model for Liquid Films in Steam Turbines and Preliminary Validations
- Author
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Simon, Amélie, primary, Marcelet, Meryem, additional, Hérard, Jean-Marc, additional, Dorey, Jean-Marc, additional, and Lance, Michel, additional
- Published
- 2016
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35. Detection of Anti-Pentraxin-3 Autoantibodies in ANCA-Associated Vasculitis
- Author
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Simon, Amélie, primary, Subra, Jean-François, additional, Guilpain, Philippe, additional, Jeannin, Pascale, additional, Pignon, Pascale, additional, Blanchard, Simon, additional, Garo, Erwan, additional, Jaillon, Sébastien, additional, Chevailler, Alain, additional, Renier, Gilles, additional, Puéchal, Xavier, additional, Bottazzi, Barbara, additional, Mantovani, Alberto, additional, Delneste, Yves, additional, and Augusto, Jean-François, additional
- Published
- 2016
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36. Relevé polarimétrique d'étoiles candidates pour des disques de débris
- Author
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Simon, Amélie and Bastien, Pierre
- Subjects
Diffusion ,Scattering ,Stars: individual (HR 8799, HD 115404) ,Etoiles : individuelles (HR 8799, HD 115404) ,Matière circumstellaire ,Polarization ,Relevés ,Circumstellar matter ,Surveys ,Instrumentation: polarimeters ,Instrumentation ,Polarisation - Abstract
Le relevé DEBRIS est effectué par le télescope spatial Herschel. Il permet d’échantillonner les disques de débris autour d’étoiles de l’environnement solaire. Dans la première partie de ce mémoire, un relevé polarimétrique de 108 étoiles des candidates de DEBRIS est présenté. Utilisant le polarimètre de l’Observatoire du Mont-Mégantic, des observations ont été effectuées afin de détecter la polarisation due à la présence de disques de débris. En raison d’un faible taux de détection d’étoiles polarisées, une analyse statistique a été réalisée dans le but de comparer la polarisation d’étoiles possédant un excès dans l’infrarouge et la polarisation de celles n’en possédant pas. Utilisant la théorie de diffusion de Mie, un modèle a été construit afin de prédire la polarisation due à un disque de débris. Les résultats du modèle sont cohérents avec les observations. La deuxième partie de ce mémoire présente des tests optiques du polarimètre POL-2, construit à l’Université de Montréal. L’imageur du télescope James-Clerk-Maxwell passe de l’instrument SCUBA à l’instrument SCUBA-2, qui sera au moins cent fois plus rapide que son prédécesseur. De même, le polarimètre suit l’amélioration et un nouveau polarimètre, POL-2, a été installé sur SCUBA-2 en juillet 2010. Afin de vérifier les performances optiques de POL-2, des tests ont été exécutés dans les laboratoires sub-millimétriques de l’Université de Western Ontario en juin 2009 et de l’Université de Lethbridge en septembre 2009. Ces tests et leurs implications pour les observations futures sont discutés., The DEBRIS survey, being performed by the space telescope Herschel, is an unbiased sampling of the debris disks candidates in the solar neighbourhood. In the first part of this thesis, a ground-based polarimetric survey of 108 DEBRIS candidate stars is presented. Using the polarimeter, “La Belle et la Bete,” at the Mont-Megantic Observatory, observations were carried out in order to detect polarization induced by the presence of a debris disk. Due to a low rate of detection, a statistical analysis was performed to compare the polarization between stars owning a debris disk with stars without one. Using Mie scattering theory, a basic model was constructed to estimate the level of polarization produced by dust grains in a debris disk. The results of this model are consistent with our observations. The second part of the thesis presents the optical tests of the polarimeter POL-2, built at Université de Montréal. The James Clerk-Maxwell-Telescope imager SCUBA has been upgraded to SCUBA-2, which is more than one hundred times faster than its predecessor with 500 times more pixels. Likewise, the polarimeter follows the improvement as a new polarimeter, POL-2, was installed on SCUBA-2 in July 2010. In order to verify the optical performance of POL-2, tests were completed at the submillimeter laboratories at the University of Western Ontario in June 2009, and the University of Lethbridge in September 2009. These tests and their implications for future observations are discussed.
- Published
- 2011
37. The influence of Arctic sea ice loss on mid-latitude climate in the cold session.
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Frankignoul, Claude, Simon, Amélie, and Gastineau, Guillaume
- Subjects
- *
SEA ice , *SNOW cover , *FALSE discovery rate , *ATMOSPHERIC circulation , *ARCTIC oscillation , *CLIMATOLOGY , *STATISTICAL significance - Abstract
Since 1979, satellite observations have shown a rapid decline of the Arctic sea ice extent (SIE), but its role in the global climate is still under debate. To establish the direct influence of the sea ice loss on mid-latitude climate, we assume that it has the same impact on the atmospheric circulation as interannual pan-Arctic SIE fluctuations with identical spatial patterns. Lag regressions are used to estimate the atmospheric response to the latter and statistical significance is estimated using the false discovery rate. In the cold season, the temporal fluctuations of the November Arctic sea ice melting pattern are significantly correlated with a negative NAO signal 1 to 3 months later, seemingly propagating downward from the stratosphere in December to the troposphere in January and February. However, multiple regression shows that the November response is primarily due to concomitant eurasian snow cover changes, so that a field significant SIE influence is only found in January and February. A similar impact of SIE fluctuations in December is detected in February and March. Scaling then leads to an observational estimate of atmospheric response to the sea ice loss in the cold season. [ABSTRACT FROM AUTHOR]
- Published
- 2019
38. An observational estimate of the influence of Arctic sea ice loss on the atmospheric circulation in the cold season
- Author
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Frankignoul, Claude, Simon, Amélie, and Gastineau, Guillaume
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13. Climate action - Abstract
Presentation at 2019 AMS annual meeting
39. Identification of key processes in bridging the Arctic warming impact and its variation on decadal timescale (D3.2)
- Author
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Manzini, Elisa, Ghosh, Rohit, Matei, Daniela, Gastineau, Guillaume, Simon, Amélie, Kwon, Young-Oh, and Yang, Shuting
- Subjects
13. Climate action - Abstract
Summary: Observational analysis of the Arctic warming impacts: The key driver bridging the winter Arctic warming (1980 to 2014) impact to the Northern Hemisphere has been identified, my means of an advanced multi-variable statistical analysis, to be a tropospheric pathway, linking interannual variability in Arctic warming to the Northern Hemisphere lower atmosphere variability with one month lag. Clearly, the analysis has shown, that the response to the pan-Arctic sea-ice changes does not involve the stratosphere. A covariation of sea-ice variability with Siberian snow cover may be responsible of previously proposed pathways of influences involving the stratosphere. In addition, the analysis suggests that the mechanism of the tropospheric pathway may include the intensification of the Ural anticyclone. Coordinated experiments on Arctic warming impact and its variation on decadal timescale: Warm Arctic Cold Eurasia in winter surface air temperature. Making use of the ensembles of atmospheric model experiment with and without Arctic sea ice forcing it has emerged that the large scale pattern of winter surface air temperature variability is an internal mode of atmospheric variability. At shorter time scales (interannual) the project models capture this internal mode of atmospheric variability. At longer time scales (multi-annual, decadal), however, the models fail to capture the variability/trend of the winter surface air temperature (over 1980-2014). Arctic sea-ice driven variability. Within the Arctic Circle, the sea-ice driven variability explains about 3% of the total variance for sea level pressure and about 23% for surface air temperature in boreal winter at interannual and longer time scales. Regionally, the sea-ice driven variability is 1-1.5 times as large as the variability driven by the other forcings over the Arctic and northern Eurasia. Contrasting Summer and Winter Impact of Arctic sea-ice loss. Large scale features of atmospheric circulation trends over the period 1980-2014 are not reproduced by models, both in winter and summer. While in winter internal atmospheric variability likely plays a role, the difference in summers may point to structural model deficiencies. Multidecadal variability in sea surface temperatures and Arctic warming. The role of variations of the Pacific Ocean surface temperatures on Arctic warming and its impacts many be hard to be identified, given that preliminary results suggest sensitivity to structural model differences., The Blue-Action project has received funding from the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement No 727852.
40. The influence of Arctic sea ice loss on mid-latitude climate in the cold season
- Author
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Frankignoul, Claude, Simon, Amélie, and Gastineau, Guillaume
- Subjects
13. Climate action - Abstract
The influence of Arctic sea ice loss on mid-latitude climate in the cold season
41. Brezhoneg war an dachenn : Enquête de dialectologie et sociolinguistique bretonnes – Breton dialectal de Guilligomarc'h
- Author
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Blanchard, Nelly, Thomas, Mannaig, Collections de corpus oraux numériques, Simon, Amélie, Pierret, Fiona, CRBC_BWD_080, Blanchard, Nelly, and Thomas, Mannaig
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bre ,Dialectologie ,sociolinguistics - Published
- 2022
42. Integral formulation and simulations of falling and sheared thin films
- Author
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Amélie Simon, Jean-Marc Hérard, Meryem Marcelet, Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Simulation et Traitement de l'information pour l'Exploitation des systèmes de Production (EDF R&D STEP), EDF R&D (EDF R&D), EDF (EDF)-EDF (EDF), Institut de Mathématiques de Marseille (I2M), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), and Simon, Amélie
- Subjects
Physics::Fluid Dynamics ,[MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP] ,[PHYS.MECA.MEFL] Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] ,[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] ,[MATH.MATH-AP] Mathematics [math]/Analysis of PDEs [math.AP] - Abstract
In the electricity production, studying liquid films in steam turbines contributes to reduce damages and losses due to wetness. Thin liquid films are created by the deposition of droplets and are highly sheared by surrounding steam. Up to now, no comprehensive and validated model has arisen to describe this phenomenon. Thus, a 2D model based on an integral formulation associated with closure laws is developed to represent this film. Compared to classical Shallow-Water equation, the model takes into account additional effects such as mass transfer, droplet impact, shearing at the free surface, surface tension, pressure gradient and rotation effects. The model properties (hyperbolicity, entropy inequality, linear stability, Galilean and rotational invariance) are examined in order to evaluate the relevance of the model. A 2D code is implemented in the EDF code Code Saturne which relies on finite volume method for unstructured meshes. The model, which degenerates into classical Shallow-Water equations for the case of a falling liquid film on a inclined plane, is validated using the experiment of [Liu and Gollub, 1994] and is compared to reference models ([Ruyer-Quil and Manneville, 2000] and [Lavalle, 2014]). Sheared film under low-pressure steam turbine conditions are simulated and also validated using the experiment of [Hammitt et al., 1981]. Unsteady simulations show that the surface tension effects are of great importance; they also give the main features in the behavior of liquid film under realistic low-pressure steam turbine conditions.
- Published
- 2017
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