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Your search keyword '"Daout, Franck"' showing total 3 results
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3 results on '"Daout, Franck"'

1. Broadband Dielectric Characterization of Bentonite for Hydromechanical Monitoring

Author

Vourc H, Eric, Bore, Thierry, Cai, Caifang, Maria Merlan, Daout, Franck, Schmitt, Françoise, Imbert, Christophe, Lesoille, Sylvie, Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS), University of Queensland [Brisbane], Laboratoire des signaux et systèmes (L2S), Université Paris-Sud - Paris 11 (UP11)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), ANDRA, Agence Nationale pour la Gestion des Déchets Radioactifs (ANDRA), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS), and Vourc'H, Eric

Subjects
Dielectric spectroscopy, hydromechanical, bentonite, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], [SPI.MECA] Engineering Sciences [physics]/Mechanics [physics.med-ph], [SPI.TRON] Engineering Sciences [physics]/Electronics, [SPI.TRON]Engineering Sciences [physics]/Electronics
Abstract

International audience; We report a method relying on a dielectric spectroscopy laboratory experimental setup and on a suitable electromagnetic model for the broadband characterization of compacted partly saturated bentonite under controlled boundary conditions. This work is a step in the development of a non destructive method with a view to the monitoring of the hydromechanical properties of clay materials such as bentonites used in civil engineering works such as nuclear waste repository closures.

Published
2017

2. Dielectric spectroscopy of artificial faeces for smouldering applications

Author

Satie, Cachan, Bore, Thierry, Placko, D., Taillade, Frédéric, Sabouroux, P., Himbert, Marc, Wagner, Norman, Delepine Lesoille, Sylvie, Six, Gonzague, Daout, Franck, Lesoille-Delepine, S., Lynch, Jerome, Yun, Chung-Bang, Wang, Kon-Well, Yerman, L., Serna, M. Llano, Wall, H., Torero, J., Scheuerman, A., Laboratoire commun de métrologie LNE-CNAM (LCM), Laboratoire National de Métrologie et d'Essais [Trappes] (LNE )-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Central des Ponts et Chaussées (LCPC), HIPE (HIPE), Institut FRESNEL (FRESNEL), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Agence Nationale pour la Gestion des Déchets Radioactifs (ANDRA), Département Mesure, Auscultation et Calcul Scientifique (LCPC/MACS), Groupe d'Electromagnétisme Appliqué (GEA), Université Paris Nanterre (UPN), BRE / Centre for fire safety engineering, University of Edinburgh, Laboratoire Central des Ponts et Chaussées (LCPC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)

Subjects
Smouldering, Permittivity, Materials science, Electromagnetics, 0211 other engineering and technologies, 02 engineering and technology, Dielectric, Network analyzer (electrical), 01 natural sciences, Dielectric spectroscopy, 010309 optics, [SPI]Engineering Sciences [physics], 0103 physical sciences, Composite material, Porous medium, Water content, ComputingMilieux_MISCELLANEOUS, 021101 geological & geomatics engineering
Abstract

Our objective is to develop an analysis concept in order to measure the in situ estimation of state parameter, such as water content, during smouldering of waste and sand mixtures. High frequency electromagnetic (HF EM) method presents a high potential for the quantitative estimation of state parameter in porous media. However, it provides indirect measurement: the major challenge is to derive robust relationship between the performed measured permittivity and the parameter under interest. Thus, laboratory measurement of dielectric properties of waste and sand mixtures under controlled boundary are urgently needed. In this preliminary study, the relative effective complex permittivity of artificial faeces was studied over the 50°MHz–3°GHz frequency range with network analyzer technique in combination with homemade open ended coaxial method. In a first step, the effect of water content on dielectric properties was investigated. The results have shown an important dispersion for the imaginary part which can be related to interface process and a systematic increase of the permittivity with water content. In a second step, a shrinking test was monitored with the homemade probe. The relative complex permittivity shows a nonlinear evolution with gravimetric water content and show marked transitions during the decrease of water content. The results of combined investigations have shown the potential of HF EM techniques for quantitative monitoring of the hydraulic state of waste and sand mixtures during smouldering combustion.

Published
2016

3. Error Analysis of Clay-RockWater Content Estimation with Broadband High-Frequency Electromagnetic Sensors—Air Gap Effect.

Author

Bore, Thierry, Wagner, Norman, Lesoille, Sylvie Delepine, Taillade, Frederic, Six, Gonzague, Daout, Franck, and Placko, Dominique

Abstract

Broadband electromagnetic frequency or time domain sensor techniques present high potential for quantitative water content monitoring in porous media. Prior to in situ application, the impact of the relationship between the broadband electromagnetic properties of the porous material (clay-rock) and the water content on the frequency or time domain sensor response is required. For this purpose, dielectric properties of intact clay rock samples experimental determined in the frequency range from 1 MHz to 10 GHz were used as input data in 3-D numerical frequency domain finite element field calculations to model the one port broadband frequency or time domain transfer function for a three rods based sensor embedded in the clay-rock. The sensor response in terms of the reflection factor was analyzed in time domain with classical travel time analysis in combination with an empirical model according to Topp equation, as well as the theoretical Lichtenecker and Rother model (LRM) to estimate the volumetric water content. The mixture equation considering the appropriate porosity of the investigated material provide a practical and efficient approach for water content estimation based on classical travel time analysis with the onset-method. The inflection method is not recommended for water content estimation in electrical dispersive and absorptive material. Moreover, the results clearly indicate that effects due to coupling of the sensor to the material cannot be neglected. Coupling problems caused by an air gap lead to dramatic effects on water content estimation, even for submillimeter gaps. Thus, the quantitative determination of the in situ water content requires careful sensor installation in order to reach a perfect probe clay rock coupling. [ABSTRACT FROM AUTHOR]

Published
2016
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