69 citations · 165 across the 14 of their papers we have counts for
15 papers
An all-topology two-fluid model for two-phase flows derived through Hamilton's Stationary Action Principle
Ward Haegeman, Giuseppe Orlando, Samuel Kokh +1
We present a novel multi-fluid model for compressible two-phase flows. The model is derived through a newly developed Stationary Action Principle framework. It is fully closed and…
A multi-dimensional, robust, and cell-centered finite-volume scheme for the ideal MHD equations
Pascal Tremblin, Rémi Bourgeois, Solène Bulteau +6
We present a new multi-dimensional, robust, and cell-centered finite-volume scheme for the ideal MHD equations. This scheme relies on relaxation and splitting techniques and can be…
A unified two-scale gas-liquid multi-fluid model with capillarity and interface regularization through a mass transfer between scales
Arthur Loison, Samuel Kokh, Teddy Pichard +1
In this contribution, we derive a gas-liquid two-scale multi-fluid model with capillarity effects to enable a novelinterface regularization approach for multi-fluid models. As this…
Two-scale modelling of two-phase flows based on the Stationary Action Principle and a Geometric Method Of Moments
Arthur Loison, Teddy Pichard, Samuel Kokh +1
In this contribution, we introduce a versatile formalism to derive unified two-phase models describing both the separated and disperse regimes. It relies on the stationary action p…
Recasting an operator splitting solver into a standard finite volume flux-based algorithm. The case of a Lagrange-Projection-type method for gas dynamics
Rémi Bourgeois, Pascal Tremblin, Samuel Kokh +1
In this paper, we propose a modification of an acoustic-transport operator splitting Lagrange-projection method for simulating compressible flows with gravity. The original method…
Radiative Rayleigh-Taylor Instability and the structure of clouds in planetary atmospheres
P. Tremblin, H. Bloch, M. González +5
Clouds are expected to form in a wide range of conditions in the atmosphere of exoplanets given the large range of possible condensible species. However this diversity might lead t…
Derivation of a two-phase flow model with two-scale kinematics, geometric variables and surface tension using variational calculus
Pierre Cordesse, Samuel Kokh, Ruben Di Battista +2
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…
A high performance and portable all-Mach regime flow solver code with well-balanced gravity. Application to compressible convection
T. Padioleau, P. Tremblin, E. Audit +2
Convection is an important physical process in astrophysics well-studied using numerical simulations under the Boussinesq and/or anelastic approximations. However these approaches…
Thermo-compositional diabatic convection in the atmospheres of brown dwarfs and in Earth's atmosphere and oceans
P. Tremblin, T. Padioleau, M. Phillips +12
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…
An all-regime and well-balanced Lagrange-projection type scheme for the shallow water equations on unstructured meshes
Christophe Chalons, Samuel Kokh, Maxime Stauffert
In this work, we focus on the numerical approximation of the shallow water equations in two space dimensions. Our aim is to propose a well-balanced, all-regime and positive scheme.…
Experimenting with the p4est library for AMR simulations of two-phase flows
Florence Drui, Alexandru Fikl, Pierre Kestener +4
Many physical problems involve spatial and temporal inhomogeneities that require a very fine discretization in order to be accurately simulated. Using an adaptive mesh, a high leve…
Sharpening methods for finite volume schemes
B Després, S Kokh, Frédéric Lagoutière
We review sharpening methods for finite volume schemes, with an emphasis on the basic structure of sharpening methods. It covers high order methods and non linear techniques for li…
A hierarchy of simple hyperbolic two-fluid models for bubbly flows
Florence Drui, Adam Larat, Samuel Kokh +1
With the objective of modeling both separate and disperse two-phase flows, we use in this paper a methodology for deriving two-fluid models that do not assume any flow topology. Th…
A large time-step and well-balanced Lagrange-Projection type scheme for the shallow-water equations
Christophe Chalons, Pierre Kestener, Samuel Kokh +1
This work focuses on the numerical approximation of the Shallow Water Equations (SWE) using a Lagrange-Projection type approach. We propose to extend to this context recent implici…
Simulation of sharp interface multi-material flows involving an arbitrary number of components through an extended five-equation model
Marie Billaud Friess, Samuel Kokh
In this paper, we present an anti-diffusive method dedicated to the simulation of interface flows on Cartesian grids involving an arbitrary number m of compress- ible components. O…