Simulation of a colliding flow setup with DGSEM (polynomial degree 3,

compatible sub-cell LGL type FV for shock capturing) of the compressible

Euler equations, where at x = +/- 64 inflow boundary conditions with

Mach number Ma = 70 is set (with periodic boundary conditions in y

direction).

Density distribution, where the color bar is plotted in logarithmic scale, at

final simulation time t=25:

Simulation with AMR (level 3 up to level 9), showing the AMR indicator at

final time t=25:

Plot of the DGSEM/FV blending factor for shock capturing at final time

t=25:

The combination of the AMR indicator and the shock capturing blending

factor triggers the final mesh refinement, as can be seen here at the final time t=25: