Samuel KOKH

About

I am an applied maths research scientist at SGLS (Service de Génie Logiciel pour la Simulation) at CEA Paris-Saclay. My work is mostly dedicated to the modeling and simulation of fluid flows.

Find me on: HAL , , orcid , Researchgate, linkedin

Misc

A booklet of Master Internship and PhD proposals at SGLS for 2024 is available here (PDF format)

Research

Research interests

Modeling: multimaterial flows modeling, Hamilton Principle, compressible flows, phase-change modeling, multi-scale modeling
Mathematicals analysis system of conservation laws, hyperbolic systems, relaxation approximation
Numerical analysis: finite volume methods, asymptotiv preserving methods, well-balanced methods
Scientific computing: HPC, Jupyter, C/C++, Python
Application fields: nuclear safety, astrophysics, geophysics

Scientific projects

I am/was involved in the following projects:

HPC@maths initiative at CMAP/Ecole Polytechnique
ERC Atmo: headed py Pascal TREMBLIN
NEEDS projects: LMN2C and M2SIR project (since 2017): headed by Bérénice GREC and Gloria FACCANONI. These projects are dedicated to the modelling of two-phase flows for nuclear applications
CEMRACS projects: I have been involved in the projects DINMOD(CEMRACS 2003), SIMCAPIAD (CEMRACS 2010)
LRC MANON CEA/LJLL, CEA-Pierre et Marie Curie University joint lab (Laboratoire de recherche conventionné), from 2010 to 2018
NEPTUNE program, CEA-EDF partnership for simulation in Thermal-Hydraulics, from 2001 to 2012

Scientific superivision

Phd students (as CEA supervisor)

Ahmad El Halabi (with T. Galié and K. Saleh), ongoing since 2023 at CEA/STMF
Rémi Bourgeois (with P. Tremlin and E. Audit), ongoing since 2020 at Maison de la simulation
Arthur Loison (with M. Massot and T. Pichard), ongoing since 2020 at Ecole Polytechnique/CMAP
Ruben Di Battista (with M. Massot et F. Laurent-Nègre), from 2017 to 2021, at Ecole Polytechnique/CMAP
Thomas Padioleau (with P. Tremblin and E. Audit) from 2017 to 2020 at Maison de la simulation
Maxime Stauffert (with P. Kestener and C. Chalons),from 2015 to 2018 at Maison de la simulation/UVSQ-LMV
Florence Drui avec (with M. Massot), from 2013 to 2016 at Maison de la simulation/CentraleSupéléc-EM2C
Mathieu Girardin (with C. Chalons), from 2011 to 2014 at CEA Saclay/Université Pierre et Marie Curie LJLL
Gloria Faccanoni (with G. Allaire and E.F. Toro), from 2005 to 2008 at CEA Saclay/Ecole Polytechnique/CMAP
Vincent Guillemaud (with Jean-Marc Hérard) from 2003 to 2007, at CEA Saclay/Université Aix-Marseille
Florian Caro (with G. Allaire) from de 2001 to 2004, at CEA Saclay/Ecole Polytechnique/CMAP

Master students (as CEA supervisor)

Pierre Fernier (with T. Galié and K. Saleh), M2 internship training in 2022 (ongoing)
Damien Prel (with S. Bulteau), M1 internship training in 2020
Ali Toufaili (with C. Chalons), M2 internship training in 2019
Alex Fikl ( with P. Kestener), M2 internship training in 2014
Florence Drui (with M. Massot, A. Larat et V. Lechenadec) M2 internship training in 2013
Mathieu Girardin (with C. Chalons), M2 internship training in 2011
Nicole Spillane (with C. Chalons) internship training in 2010
Victor Michel (with Anthony Geay), M2 internship training in 2010
Laurent Ango (with C. Chalons), Sup Galilée internship training in 2010
Tran Minh Phuong, M2 internship training in 2009
Gloria Faccanoni, M2 internship training in 2005
Vincent Guillemaud (with A. Ambroso and J.-M. Hérard) M2 internship training in 2003
Rosette Tuy (with P. Fillion) M2 internship training 2002

Publications

Publication dans des journaux / Publications in journals

R. Bourgeois, P. Tremblin, S. Kokh, T. Padioleau.

Recasting an operator splitting solver into a standard finite volume flux-based algorithm. The case of a Lagrange-projection-type method for gas dynamics In: Journal of Computational Physics 496 (jan. 2024), p. 112594. (arxiv)

T. Gallouët , O. Hurisse, S. Kokh.

A random choice scheme for scalar advection International Journal for Numerical Methods in Fluids vol. 95, Issue 10 (oct 2023), pp. 1656-1685. (HAL)

Z. Zou, N. Grenier, S. Kokh, C. Tenaud et E. Audit.

Compressible solver for two-phase flows with sharp interface and capillary effects preserving accuracy in the low Mach regime. In: Journal of Computational Physics 448 (jan. 2022), p. 110735. (HAL)

P. Tremblin, H. Bloch, M. González, E. Audit, S. Fromang, T. Padioleau, P. Kestener et S. Kokh.

Radiative Rayleigh-Taylor instability and the structure of clouds in planetary atmospheres. In : Astronomy & Astrophysics 653 (sept. 2021), A30. (HAL)

F. Drui, A. Larat, S. Kokh, and M. Massot.

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

Journal of Fluid Mechanics, Cambridge University Press (CUP), 2019, Vol. 876, pp. 326-355 (HAL)

P. Tremblin, T. Padioleau, M. W. Phillips, G. Chabrier, I. Baraffe, S. Fromang, E. Audit, H. Bloch, A. J. Burgasser, B. Drummond, , M. González, P. Kestener, S. Kokh., P.-O. Lagage and M. Stauffert

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

The Astrophysical Journal, American Astronomical Society, 2019, Vol. 876(2), p. 144 (HAL)

T. Padioleau, P. Tremblin, E. Audit, P. Kestener and S. Kokh.

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

The Astrophysical Journal, American Astronomical Society, 2019, Vol. 875(2), p. 128 (arxiv)

Grenier, C., Anbergen, H., Bense, V., Chanzy, Q. , Coon, E., Collier, N., Costard, F., Ferry, M., Frampton, A., Frederick, J., Gonçalvès, J., Holmén, J., Jost, A., S. Kokh., Kurylyk, B., McKenzie, J., Molson, J., Mouche, E., Orgogozo, L., Pannetier, R., Rivière, A., Roux, N., Rühaak, W., Scheidegger, J., Selroos, J.-O., Therrien, R., Vidstrand, P. and Voss, C.

Groundwater flow and heat transport for systems undergoing freeze-thaw: Intercomparison of numerical simulators for 2D test cases (HAL)

Advances in Water Resources, 2018, Vol. 114, pp. 196-218

C. Chalons, P. Kestener, S. Kokh. and M. Stauffert

A large time-step and well-balanced Lagrange-projection type scheme for the shallow water equations

Comm. in Math. Sciences, 2017, Vol. 15(3), pp. 765-788 (HAL)

C. Chalons, M. Girardin and S. Kokh.

An all-regime Lagrange-Projection like scheme for 2D homogeneous models for two-phase flows on unstructured meshes

Journal of Computational Physics, 2017, Vol. 335, pp. 885--904 (HAL)

C. Chalons, M. Girardin and S. Kokh.

An all-regime Lagrange-Projection like scheme for the gas dynamics equations on unstructured meshes

Comm. in Comp. Phys., 2016, Vol. 20(1), pp. 188-233 (HAL)

M. Billaud-Friess and S. Kokh.

Simulation of sharp interface multi-material flows involving an arbitrary number of components through an extended five-equation model

Journal of Computational Physics, 2014, Vol. 273(0), pp. 488 - 519 (arxiv)

C. Chalons, M. Girardin and S. Kokh.

Large time step and asymptotic preserving numerical schemes for the gas dynamics equations with source terms.

SIAM J. Sci. Comput., Society for Industrial and Applied Mathematics (SIAM), Philadelphia, PA, 2013, Vol. 35(6), pp. a2874-a2902 (HAL)

V. Faucher and S. Kokh.

Extended Vofire algorithm for fast transient fluid-structure dynamics with liquid-gas flows and interfaces

Journal of Fluids and Structures, 2013, Vol. 39(0), pp. 102-125 (HAL)

G. Faccanoni, S. Kokh. and G. Allaire

Modelling and simulation of liquid-vapor phase transition in compressible flows based on thermodynamical equilibrium

M2AN, 2012, Vol. 46, pp. 1029-1054 (HAL)

S. Kokh. and F. Lagoutière

An Anti-Diffusive Numerical Scheme for the Simulation of Interfaces between Compressible Fluids by Means of a Five-Equation Model

J. Comp. Phys., 2010, Vol. 229(8), pp. 2773-2809 (HAL)

F. Caro, F. Coquel, D. Jamet and S. Kokh.

A simple finite-volume method for compressible isothermal two-phase flows simulation

Int. J. Finite Volumes, 2006, Vol. 3(1) (HAL)

S. Kokh and G. Allaire

Test-case n°19: shock-bubble interaction (pn)

Multiphase Science and Technology, Begell House, 2004, Vol. 16(1-3), pp. 117-120 (HAL)

G. Allaire, S. Clerc and S. Kokh.

A five-equation model for the simulation of interfaces between compressible fluids

J. Comp. Phys., 2002, Vol. 181, pp. 577-616

Notes

G. Faccanoni, S. Kokh. and G. Allaire

Approximations of Liquid-Vapor Phase Transition for Compressible Fluids with Tabulated EOS

C. R. Acad. Sci. Paris, Série I, 2010, Vol. t. 348, pp. 473-478 (HAL)

G. Faccanoni, S. Kokh. and G. Allaire

A strictly hyperbolic equilibrium phase transition model

C. R. Acad. Sci. Paris, Série I, 2007, Vol. t. 344, pp. 135-140

(hal-01018835)

G. Allaire, S. Clerc and S. Kokh.

A Five-Equation Model for the Numerical Simulation of Interfaces in Two-Phase Flows

C. R. Acad. Sci., 2000, Vol. t. 331(12), pp. 1017-1022 (sciencedirect)

Actes de conférences / Proceedings

F. Drui, A. Fikl, P. Kestener, S. Kokh., A. Larat, V. Le Chenadec and M. Massot.

Experimenting with the p4est library for AMR simulations of two-phase flows

ESAIM: Proc., 2016, Vol. 53, pp. pp.~232-247 (arxiv)

M. Billaud-Friess and S. Kokh.

An anti-diffusive Lagrange-Remap scheme for multi-material compressible flows with an arbitrary number of components

ESAIM: PROCEEDINGS Congrés SMAI, 2012, Vol. 35, pp. pp.~203-209 (esaim proc)

M. Billaud-Friess, Boutin, B., G. Faccanoni, Caetano, F., S. Kokh., F. Lagoutière and L. Navoret

A Second Order Anti-Diffusive Lagrange-Remap Scheme for Two-Component Flows

ESAIM : Proc., 2011, pp. 149-162 (esaim proc)

C. Chalons, S. Kokh. and Spillane, N.

Large time-step numerical scheme for the seven-equation model of compressible two-phase flows

Springer (ed.), Proceedings in Mathematics, FVCA 6, 2011, Vol. 4(1), pp. 225-233 (HAL)

G. Faccanoni, S. Kokh. and G. Allaire

Numerical simulation with finite volume of a dynamic liquid-vapour phase transition

R. Eymard & others (ed.), Finite volumes for complex applications V, Problems and perspectives, 2008, pp. 391-398 (HAL)

S. Kokh. and F. Lagoutière

An Anti-Diffusive Method for Simulating Compressible Two-Phase Flows with Interfaces

R. Eymard& others (ed.), Finite volumes for complex applications V, Problems and perspectives, 2008, pp. 519-526

F. Caro, F. Coquel, D. Jamet and S. Kokh.

Phase change simulation for isothermal compressible two-phase flows

AIAA Comp. Fluid Dynamics, 2005(AIAA-2005-4697)

F. Caro, F. Coquel, D. Jamet and S. Kokh.

DINMOD: a Diffuse Interface Model for Two-Phase Flows Modelling

Cordier, S. & others (ed.)

Numerical method for hyperbolic and kinetic problems: CEMRACS 2003, 2005 (HAL)

G. Allaire and S. Kokh.

Numerical Simulation of 2D Two-Phase Flows with Interface

Academic/Plenum, K. (ed.), Godunov Methods Theory and Applications, 2000

G. Allaire and S. Kokh.

Simulating Interfaces in Two-Phase Flows

Proc. AMIF-ESF Workshop Computing Methods for Two-Phase Flow, 2000

G. Allaire, S. Clerc and S. Kokh.

Towards Boiling Crisis Simulation: the Level Set Method

Nureth-9 Proceedings, San Francisco, 1999

Contribution à des ouvrages / Contribution to books

B. Després, S. Kokh. and F. Lagoutière

Chapter 4 - Sharpening Methods for Finite Volume Schemes

R. Abgrall & C.-W. Shu (ed.)

Handbook of Numerical Methods for Hyperbolic Problems, Basic and Fundamental Issues

Elsevier, 2016, Vol. 17, pp. 77-102 (HAL)

Thèses/Theses

Habilitation à diriger des recherches (HDR) / Habilitation to conduct research

(defended in 2021 at Université Paris-Saclay)

Modélisation et simulation d’écoulements de fluides (HAL)

Thèse de doctorat/Ph.D Thesis

(under the supervision of Pr. G. Allaire, defended in 2001 at Université Pierre et Marie Curie)

Aspects numériques et théoriques de la modélisation des écoulements diphasiques compressibles par des méthodes de capture d’interface

Teaching

This section is work in progress...