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Journal Articles Journal of Computational Physics Year : 2024

An implicit-explicit solver for a two-fluid single-temperature model


We present an implicit-explicit finite volume scheme for two-fluid single-temperature flow in all Mach number regimes which is based on a symmetric hyperbolic thermodynamically compatible description of the fluid flow. The scheme is stable for large time steps controlled by the interface transport and is computational efficient due to a linear implicit character. The latter is achieved by linearizing along constant reference states given by the asymptotic analysis of the single-temperature model. Thus, the use of a stiffly accurate IMEX Runge Kutta time integration and the centered treatment of pressure based quantities provably guarantee the asymptotic preserving property of the scheme for weakly compressible Euler equations with variable volume fraction. The properties of the first and second order scheme are validated by several numerical test cases.
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Dates and versions

hal-04381415 , version 1 (09-01-2024)



Mária Lukáčová-Medvid'ová, Ilya Peshkov, Andrea Thomann. An implicit-explicit solver for a two-fluid single-temperature model. Journal of Computational Physics, 2024, 498, pp.112696. ⟨10.1016/⟩. ⟨hal-04381415⟩
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