Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Numerical Evaluation of Mass-Diffusive Compressible Fluids Flows Models
Bodnár T., Fraunié Ph.
Abstract:
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.
Keywords:
compressible Navier-Stokes, nearly incompressible flow, mass diffusion, compact finite-difference

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2024.004

In Proceedings Topical Problems of Fluid Mechanics 2024, Prague, 2024, Edited by David Šimurda and Tomáš Bodnár, pp. 23 ISBN 978-80-87012-88-8 (Print) ISSN 2336-5781 (Print)