Special Session 25: Recent Progress on Mathematical Analysis of PDEs Arising in Fluid Dynamics

Convergence of a finite volume method to weak solutions for the compressible Navier-Stokes-Fourier system
Bangwei She
Capital Normal University
Peoples Rep of China
Co-Author(s):    Eduard Feireisl, Maria Luk\`a\v{c}ov\`a-Medvid`ov\`a, Yuhuan Yuan
Abstract:
We prove strong convergence of an upwind-type finite volume method to a weak solution of the Navier-Stokes-Fourier system with the Dirichlet boundary conditions. The limit solution satisfies a weak form of the mass and momentum equations, together with a weak form of the entropy and ballistic energy inequalities, and complies with the weak-strong uniqueness principle. The finite volume method uses piecewise-constant spatial approximations. The convergence proof is based on a combination of delicate consistency estimates with a careful analysis of the oscillations of numerical densities via renormalisation of the continuity equation.