Convergence of the MAC scheme for the compressible stationary Navier-Stokes equations
Provides a rigorous convergence proof for a widely used numerical scheme in computational fluid dynamics, addressing a known theoretical gap.
The paper proves convergence of the MAC scheme for steady-state compressible Navier-Stokes equations on Cartesian grids, establishing existence of solutions and showing that limits satisfy the governing equations.
We prove in this paper the convergence of the Marker and Cell (MAC) scheme for the discretization of the steady state compressible and isentropic Navier-Stokes equations on two or three-dimensional Cartesian grids. Existence of a solution to the scheme is proven, followed by estimates on approximate solutions, which yield the convergence of the approximate solutions, up to a subsequence, and in an appropriate sense. We then prove that the limit of the approximate solutions satisfies the mass and momentum balance equations, as well as the equation of state, which is the main difficulty of this study.