Numerical evaluation of mass-diffusive compressible fluids flows models

0583290 - MÚ 2025 RIV CZ eng C - Conference Paper (international conference)
Bodnár, Tomáš - Fraunié, P.
Numerical evaluation of mass-diffusive compressible fluids flows models.
Topical Problems of Fluid Mechanics. Prague: Institute of Thermomechanics AS CR, v. v. i., 2024 - (Šimurda, D.; Bodnár, T.), s. 23-30. ISBN 978-80-87012-88-8. ISSN 2336-5781.
[Topical Problems of Fluid Mechanics 2024. Prague (CZ), 21.02.2024-23.02.2024]
R&D Projects: GA ČR(CZ) GA22-01591S
Grant - others:AV ČR(CZ) AP2101
Program: Akademická prémie - Praemium Academiae
Institutional support: RVO:67985840
Keywords : compressible Navier-Stokes * nearly incompressible flow * mass diffusion * compact finite-difference
OECD category: Pure mathematics
https://doi.org/10.14311/TPFM.2024.004

This contribution presents first numerical tests of some recently published alternative models for solution of viscous compressible and nearly incompressible models. All models are solved by high resolution compact finite difference scheme with strong stability preserving RungeKutta time stepping. The two simple but challenging computational test cases are presented, based on the double-periodic shear layer and the Kelvin-Helmholtz instability. The obtained time-dependent flow fields are showing pronounced shear and vorticity layers being resolved by the standard as well as by the new mass-diffusive modified models. The preliminary results show that the new models are viable alternative to the well established classical models.
Permanent Link: https://hdl.handle.net/11104/0351290