Richtmeyer Meshkov 2D test problem

Test:

2D HD test: Shock interaction with a contact discontinuity

Introduction

This is a 2D test (as studied e.g. in Delmont et al, JFM 2009, 627, 33-53) where a planar shock impinges on an inclined contact discontinuity. The evolution in the early stages as far as the refraction pattern is concerned, can be predicted analytically, while the long term evolution shows Richtmeyer-Meshkov instability taking place on the shocked contact interface. The AMR will be beneficial to get highly detailed finestructure.

How to run

Setting up the files

$AMRVAC_DIR/setup.pl -d=2

Compiling

Simply issue the make command:

make

Running the code

To run with e.g. 4 processors, use

mpirun -np 4 ./amrvac -i amrvac.par

Changing the parameters

A complete list of parameters can be found par.md.

Changing the physics and initial conditions

Have a look at the local file mod_usr.t. You can modify the initial conditions easily, try setting up shocks of different Mach number or change the impact angle and density contrast at the density discontinuity. Verify how different schemes and resolutions perform on this test. A relevant extra variable in output is a Schlieren plot of the density (gradient).