The images here were taken from a calculation done by Kevin Olson(Univ. of Chicago) using a 2D Muscl hydro code with an approximate Riemann (Rusanov) solver. The simulation was of supersonic flow (mach 10) past a square obstacle.
Image 1. The mass density.
Image 2. Same as Image 1 but with the grid block boundaries superimposed. Each grid block has 8x8 grid cells.
