Výsledky vyhledávání

Compressible solver for two-phase flows with sharp interface and capillary effects preserving accuracy in the low Mach regime

Autor: Ziqiang Zou, Christian Tenaud, Samuel Kokh, Nicolas Grenier, Edouard Audit

Publikováno v: Journal of Computational Physics
Journal of Computational Physics, Elsevier, 2022, 448, pp.110735. ⟨10.1016/j.jcp.2021.110735⟩
Journal of Computational Physics, 2022, 448, pp.110735. ⟨10.1016/j.jcp.2021.110735⟩

We present a sharp interface approach for compressible two-phase flows that preserves its accuracy in the low Mach regime. The interface between both fluids is captured by a Level Set function via the Ghost Fluid method. In the low Mach regime, class

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c9ec32c1f3f9edc2fa2ae07abd4e72d
https://hal.archives-ouvertes.fr/hal-03367730

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A Diffuse Interface Approach For Disperse Two-Phase Flows Involving Dual-Scale Kinematics Of Droplet Deformation Based On Geometrical Variables

Autor: Lionel Matuszewski, Pierre Cordesse, Samuel Kokh, Thibaut Ménard, Ruben Di Battista, Quentin Chevalier, Marc Massot

Publikováno v: ESAIM: Proceedings and Surveys
ESAIM: Proceedings and Surveys, 2020, Second Workshop on Compressible Multiphase Flows: Derivation, closure laws, thermodynamics, 69, pp.24-46. ⟨10.1051/proc/202069024⟩
ESAIM: Proceedings and Surveys, EDP Sciences, 2020, Second Workshop on Compressible Multiphase Flows: Derivation, closure laws, thermodynamics, 69, pp.24-46. ⟨10.1051/proc/202069024⟩
ESAIM: Proceedings and Surveys, Vol 69, Pp 24-46 (2020)

The purpose of this contribution is to derive a reduced-order two-phase flow model in- cluding interface subscale modeling through geometrical variables based on Stationary Action Principle (SAP) and Second Principle of Thermodynamics in the spirit o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c446edbec636fe0c01876c12699bc6b
https://hal.science/hal-02879950/file/main.pdf

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An All-Regime and Well-Balanced Lagrange-Projection Scheme for the Shallow Water Equations on Unstructured Meshes

Autor: Maxime Stauffert, Samuel Kokh, Christophe Chalons

Publikováno v: Continuum Mechanics, Applied Mathematics and Scientific Computing: Godunov's Legacy ISBN: 9783030388690

We are interested in the numerical approximation of the shallow water equations in two space dimensions. We propose a well-balanced, all-regime, and positive scheme. Our approach is based on a Lagrange-projection decomposition which allows to natural

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1b21ae69285f930374655410db736cdc
https://doi.org/10.1007/978-3-030-38870-6_11

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Small-scale kinematics of two-phase flows: identifying relaxation processes in separated- and disperse-phase flow models

Autor: Florence Drui, Marc Massot, Samuel Kokh, Adam Larat

Publikováno v: Journal of Fluid Mechanics
Journal of Fluid Mechanics, Cambridge University Press (CUP), 2019, 876, pp.326-355. ⟨10.1017/jfm.2019.538⟩
Journal of Fluid Mechanics, 2019, 876, pp.326-355. ⟨10.1017/jfm.2019.538⟩

We propose here to investigate the impact of small-scale effects on the bulk evolution of a two-phase flow system. More precisely, we choose to examine the sole influence of a small-scale (with respect to the bulk velocity) off-equilibrium velocity o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::755cc90fa9f8f7e48f54e29b8df0401b
https://hal.archives-ouvertes.fr/hal-01349441

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Derivation of a two-phase flow model with two-scale kinematics and surface tension by means of variational calculus

Autor: Pierre Cordesse, Samuel KOKH, Ruben Di Battista, Marc Massot

Publikováno v: HAL

International audience; The present paper proposes a definition of a two-phase interface that relies on a probability density function. This definition enables to introduce a scale separation in the definition this interface and to define fields that

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::d3933fbfd95eff44a1a956e0c6d454b4
https://hal.science/hal-02194951

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Thermo-compositional Diabatic Convection in the Atmospheres of Brown Dwarfs and in Earth’s Atmosphere and Oceans

Autor: Mark W. Phillips, Isabelle Baraffe, Gilles Chabrier, P. O. Lagage, Samuel Kokh, Adam J. Burgasser, T. Padioleau, Pascal Tremblin, Pierre Kestener, M. González, Benjamin Drummond, Edouard Audit, Maxime Stauffert, S. Fromang, H. Bloch

Publikováno v: The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2018, ⟨10.3847/1538-4357/ab05db⟩
The Astrophysical Journal, 2018, ⟨10.3847/1538-4357/ab05db⟩

By generalizing the theory of convection to any type of thermal and compositional source terms (diabatic processes), we show that thermohaline convection in Earth oceans, fingering convection in stellar atmospheres, and moist convection in Earth atmo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b00db47dd13694d8195a6f1b4f0ea60

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Derivation of a two-phase flow model with two-scale kinematics, geometric variables and surface tension using variational calculus

Autor: Pierre Cordesse, Samuel KOKH, Ruben Di Battista, Florence Drui, Marc Massot

Publikováno v: NASA Technical Memorandum
NASA Technical Memorandum, In press
NASA Technical Memorandum, inPress
HAL

The present paper proposes a two-phase flow model that is able to account for two-scale kinematics and two-scale surface tension effects based on geometric variables at small scale. At large scale, the flow and the full geometry of the interface may

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::720e7cbeb9afbfa63632f7badc092f97

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A High-performance and Portable All-Mach Regime Flow Solver Code with Well-balanced Gravity. Application to Compressible Convection

Autor: Pierre Kestener, Samuel Kokh, T. Padioleau, Pascal Tremblin, Edouard Audit

Publikováno v: The Astrophysical Journal

Convection is an important physical process in astrophysics well-studied using numerical simulations under the Boussinesq and/or anelastic approximations. However these approaches reach their limits when compressible effects are important in the high

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a987c2260177c9ed2e669b8f03d9a32

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