Simulation of flow past two solid cylinders. The first plot shows the grid and in the second we plot 30 contours of ρ from 0 to 10 for two solid cylinders initially immersed in a fluid of constant state, Mach 3 and velocity 0.8, with density 1.4 and adiabatic index 1.4. The solution is shown at time 10. The GFORCE¹ scheme was used, with the van Leer slope-limiter, and a CFL of 0.95.