About

I am an applied maths research scientist at STMF (Service de Thermohydraulique et Mécanique des Fluides) at CEA Paris-Saclay. My work is mostly dedicated to the modeling and simulation of fluid flows.

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

Research

Research interests

Scientific projects

I am/was involved in the following projects:

Scientific superivision

Phd students (as CEA supervisor) Master students (as CEA supervisor)

Publications

Publication dans des journaux / Publications in journals

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...
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