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40 results on '"Podryga, Viktoriia"'

1. Using Parallel Technologies to Calculate Fluid Dynamic Processes in a Fractured-Porous Reservoir Taking into Account Non-isothermality

Author

Uzyanbaev, Ravil M., Poveshchenko, Yury A., Podryga, Viktoriia O., Polyakov, Sergey V., Bobreneva, Yuliya O., Rahimly, Parvin I., Gubaydullin, Irek M., Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Voevodin, Vladimir, editor, Sobolev, Sergey, editor, Yakobovskiy, Mikhail, editor, and Shagaliev, Rashit, editor

Published
2023
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3. Analysis of Parallel Algorithm Efficiency for Numerical Solution of Mass Transfer Problem in Fractured-Porous Reservoir

Author

Uzyanbaev, Ravil, Poveshchenko, Yury, Podryga, Viktoriia, Polyakov, Sergey, Bobreneva, Yuliya, Gubaydullin, Irek, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Voevodin, Vladimir, editor, Sobolev, Sergey, editor, Yakobovskiy, Mikhail, editor, and Shagaliev, Rashit, editor

Published
2022
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4. Development of Web Environment for Modeling the Processes of Macroscopic and Microscopic Levels for Solving Conjugate Problems of Heat and Mass Transfer

Author

Tarasov, Nikita, Polyakov, Sergey, Podryga, Viktoriia, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Voevodin, Vladimir, editor, Sobolev, Sergey, editor, Yakobovskiy, Mikhail, editor, and Shagaliev, Rashit, editor

Published
2022
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5. Numerical Analysis of One Two-layer Completely Conservative Difference Scheme of Gas Dynamics in Eulerian Variables with Adaptive Viscosity

Author

Rahimly, Orkhan, Poveshchenko, Yury, Podryga, Viktoriia, Rahimly, Parvin, Barth, Timothy J., Series Editor, Griebel, Michael, Series Editor, Keyes, David E., Series Editor, Nieminen, Risto M., Series Editor, Roose, Dirk, Series Editor, Schlick, Tamar, Series Editor, Badriev, Ildar B., editor, Banderov, Victor, editor, and Lapin, Sergey A., editor

Published
2022
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8. The Approach to the Construction of Difference Schemes with a Consistent Approximation of the Stress-Strain State and the Energy Balance of the Medium in Cylindrical Geometry

Author

Poveshchenko, Yury, Gasilov, Vladimir, Podryga, Viktoriia, Sharova, Yulia, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Lirkov, Ivan, editor, and Margenov, Svetozar, editor

Published
2020
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9. Two-Layer Completely Conservative Difference Scheme of Gas Dynamics in Eulerian Variables with Adaptive Regularization of Solution

Author

Rahimly, Orkhan, Podryga, Viktoriia, Poveshchenko, Yury, Rahimly, Parvin, Sharova, Yulia, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Lirkov, Ivan, editor, and Margenov, Svetozar, editor

Published
2020
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10. Some Problems of Modeling the Impact on Gas Hydrates on the Basis of Splitting by Physical Processes

Author

Rahimly, Parvin, Podryga, Viktoriia, Poveshchenko, Yury, Rahimly, Orkhan, Sharova, Yulia, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Lirkov, Ivan, editor, and Margenov, Svetozar, editor

Published
2020
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12. Completely Conservative Difference Schemes for Simultaneous Calculations of Thawed Hydrated Zone and Piezoconductive Medium with Gas Hydrate Inclusions

Author

Rahimly, Parvin, Poveshchenko, Yury, Podryga, Viktoriia, Rahimly, Orkhan, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Dimov, Ivan, editor, Faragó, István, editor, and Vulkov, Lubin, editor

Published
2019
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13. About Free-Volumetric Approximation of a Piezoconductive Medium with Gas Hydrate Inclusions

Author

Poveshchenko, Yury, Podryga, Viktoriia, Rahimly, Parvin, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Dimov, Ivan, editor, Faragó, István, editor, and Vulkov, Lubin, editor

Published
2019
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14. Multiscale Mathematical Modeling of the Metal Nanoparticles Motion in a Gas Flow

Author

Podryga, Viktoriia, Polyakov, Sergey, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Dimov, Ivan, editor, Faragó, István, editor, and Vulkov, Lubin, editor

Published
2019
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15. Finite Difference Schemes on Locally Refined Cartesian Grids for the Solution of Gas Dynamic Problems on the Basis of Quasigasdynamics Equations

Author

Karamzin, Yury N., Kudryashova, Tatiana A., Polyakov, Sergey V., Podryga, Viktoriia O., Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Dimov, Ivan, editor, Faragó, István, editor, and Vulkov, Lubin, editor

Published
2019
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20. Numerical investigation of gas hydrate dissociation in the porous medium of multiphase flow.

Author

Abu-Nab, Ahmed K., Koldoba, Alexander V., Koldoba, Elena V., Poveshchenko, Yury A., Podryga, Viktoriia O., Rahimly, Parvin I., and Bakeer, Ahmed E.

Subjects
MULTIPHASE flow, POROUS materials, GAS hydrates, METHANE hydrates, NONLINEAR equations, FINITE differences
Abstract

Understanding the mechanisms involved in the growth and decomposition of methane hydrates (MHs) is currently an urgent issue since they are essential in improving the global climate and future energy supplies. As a result, many scientists and researchers around the world are looking into and studying this critical topic. The objective of the presented work is to illustrate the thermo-physical processes of MHs decomposition in porous media based on a one-dimensional model throughout a multiphase flow. The thermodynamic equilibrium, which actually happens between temperature and pressure (P-T) in the hydrate stability region. The mathematical model was presented and solved by using the implicit finite differences technique under the initial and boundary conditions. After the Jacobin matrix was formed, the system of nonlinear algebraic equations was solved by using the Newton-Raphson methodology. Within the framework of this study, we take into consideration the Buckley-Leverett problem of incompressible fluid displacement. Our approach and computations are predicated on the assumption that there are constant heat conditions without hydrate formation anywhere in the whole computational domain. [ABSTRACT FROM AUTHOR]

Published
2023
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21. New Grid Approach for Solution of Boundary Problems for Convection-Diffusion Equations

Author

Polyakov, Sergey V., Karamzin, Yuri N., Kudryashova, Tatiana A., Podryga, Viktoriia O., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Dimov, Ivan, editor, Faragó, István, editor, and Vulkov, Lubin, editor

Published
2017
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22. Calculation of Kinetic Coefficients for Real Gases on Example of Nitrogen

Author

Podryga, Viktoriia O., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Dimov, Ivan, editor, Faragó, István, editor, and Vulkov, Lubin, editor

Published
2017
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23. Parallel Software for Simulation of Nonlinear Processes in Technical Microsystems

Author

Polyakov, Sergey, Podryga, Viktoriia, Puzyrkov, Dmitry, Kudryashova, Tatiana, Diniz Junqueira Barbosa, Simone, Series editor, Chen, Phoebe, Series editor, Du, Xiaoyong, Series editor, Filipe, Joaquim, Series editor, Kara, Orhun, Series editor, Kotenko, Igor, Series editor, Liu, Ting, Series editor, Sivalingam, Krishna M., Series editor, Washio, Takashi, Series editor, Voevodin, Vladimir, editor, and Sobolev, Sergey, editor

Published
2016
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24. One Approach to Numerical Modeling of the Heat and Mass Transfers of Two-Phase Fluids in Fractured-Porous Reservoirs.

Author

Bobreneva, Yuliya O., Poveshchenko, Yury, Podryga, Viktoriia O., Polyakov, Sergey V., Uzyanbaev, Ravil M., Rahimly, Parvin I., Mazitov, Ainur A., and Gubaydullin, Irek M.

Subjects
HEAT transfer, DOMAIN decomposition methods, FINITE difference method, MASS transfer, DIFFERENTIAL operators, MATHEMATICAL models
Abstract

The work is devoted to numerical modeling of the processes of heat and mass transfer of a two-phase fluid in the environment of a production well, which is necessary for monitoring the development of fractured-porous reservoirs. This work proposes an efficient approach to constructing a solution to the problem. To solve the problem, a model of the "double medium" type is used, where the pore part of the reservoir is considered as the first medium, and the system of natural fractures is considered as the second medium. For the resulting mathematical model, the difference schemes with time weights are constructed based on the algorithm of splitting by physical processes, which ensure the correctness and consistency of fluxes in the fracture system and the pore reservoir. In the numerical solution, the approximations of differential operators obtained in the framework of the finite difference method are used. For the parallel implementation of the developed numerical approach, the domain decomposition method and the matrix sweep algorithm are chosen. The program implementation is made using the MPI standard. Computational experiments are carried out, the results of which confirm the effectiveness of the developed numerical algorithm and its parallel implementation. In numerical experiments, the distributions of pressure and temperature near an operating production well are obtained, on the basis of which it is possible to adjust the operation of wells in order to increase production. [ABSTRACT FROM AUTHOR]

Published
2023
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33. Multiscale Multilevel Approach to Solution of Nanotechnology Problems

Author

Polyakov Sergey and Podryga Viktoriia

Subjects
Physics, QC1-999
Abstract

The paper is devoted to a multiscale multilevel approach for the solution of nanotechnology problems on supercomputer systems. The approach uses the combination of continuum mechanics models and the Newton dynamics for individual particles. This combination includes three scale levels: macroscopic, mesoscopic and microscopic. For gas–metal technical systems the following models are used. The quasihydrodynamic system of equations is used as a mathematical model at the macrolevel for gas and solid states. The system of Newton equations is used as a mathematical model at the mesoand microlevels; it is written for nanoparticles of the medium and larger particles moving in the medium. The numerical implementation of the approach is based on the method of splitting into physical processes. The quasihydrodynamic equations are solved by the finite volume method on grids of different types. The Newton equations of motion are solved by Verlet integration in each cell of the grid independently or in groups of connected cells. In the framework of the general methodology, four classes of algorithms and methods of their parallelization are provided. The parallelization uses the principles of geometric parallelism and the efficient partitioning of the computational domain. A special dynamic algorithm is used for load balancing the solvers. The testing of the developed approach was made by the example of the nitrogen outflow from a balloon with high pressure to a vacuum chamber through a micronozzle and a microchannel. The obtained results confirm the high efficiency of the developed methodology.

Published
2018
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35. CFD Problems Solving Parallel Approaches on Supercomputers

Author

Kudryashova Tatiana, Polyakov Sergey, and Podryga Viktoriia

Subjects
Engineering (General). Civil engineering (General), TA1-2040
Abstract

The work is devoted to developing and testing parallel algorithms, suit of computer programs for numerical solution of CFD-problems on modern supercomputers. The paper summarizes our experience in solving various practical problems of gas dynamics. These problems include research of gas flow around bodies of complex shape by viscous gas flows with radiation processes near the surface of the bodies, calculations of jet streams in the open space and flows in micro channels of technical systems. We have developed approaches combining unstructured grids, domain decomposition technique, parallel implementation via MPI technology, OpenMP, CUDA. Calculations are performed on the heterogeneous computer systems with Graphical Processing Units, classical microprocessors (Central Processing Units) and use advanced parallel approaches.

Published
2016
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40. A NUMERICAL APPROACH TO STUDY THE THERMAL INFLUENCE ON GAS HYDRATES BY PHYSICAL PROCESS SPLITTING.

Author

POVESHCHENKO, YURY, RAHIMLY, PARVIN, RAHIMLY, ORKHAN, PODRYGA, VIKTORIIA, and GASILOVA, IRINA

Subjects
*METHANE hydrates, *GAS hydrates, *GAS distribution, *GAS dynamics, *GAS wells, *THERMODYNAMIC equilibrium
Abstract

The method of numerical simulation based on the splitting by physical processes of gas-hydrodynamic processes, which occur during the dissociation of gas hydrates in a porous medium, is described. In this paper, a coupled discrete model of a two-component (H2O,CH4) three-phase (water, methane, hydrate) filtration uid dynamics and two-phase processes in a thawed zone with absence of gas hydrates in thermodynamic equilibrium has been developed, by using the splitting by physical processes as a valid assumption. The obtained split model is differentially equivalent to the discrete initial balance equations of the system (conservation of the mass components of the uids and the total energy of the system), written in divergent form. Such an approach to create completely conservative difference schemes in the studied uid-hydrate medium requires the introduction of a special free-volume nonlinear approximation of grid functions over time, which depends on the volume fraction in the pores occupied by uids, and is simple to implement. The direct unsplit use of the studied system for the purposes of determining the dynamics of variables and constructing the implicit difference scheme required for calculations of filtering processes with large time steps is difficult. The paper also presents the method of coupled solutions of systems of equations describing the processes in various fields, each of which is characterized by its own set of coexisting phases, and the coordination of computational schemes for them is not an automatic process. In the results of the calculations, the volumetric three-phase phase transitions were numerically investigated using a single calculation with a variable number of phases region of the entire plane of the P and T parameters. Using the example of the Messoyakha's gas hydrate deposit, the local processes of technogenic depressive impact directly near the wells on the dynamics of the gas distribution of gas hydrates thawing and formation of thawed two-phase zones were studied. [ABSTRACT FROM AUTHOR]

Published
2020

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