Running Astrix

Command line options

Issueing astrix gives:

Usage: astrix [-d] [-v verboseLevel] [-D debugLevel] [-r restartNumber] [-cl conservationLaw] filename
-d                  : run on GPU device
-v verboseLevel     : amount of output to stdout (0 - 2)
-D debugLevel       : amount of extra checks for debugging
-r restartNumber    : try to restart from previous dump
-cl conservationLaw : use different conservation law. Can be
                      either "advect", "burgers"
                      "cart_iso" or "cart_euler"
filename            : input file name

Test problems

A few test problems for the Euler equations are supplied in the Astrix/run/euler directory. Each directory contains an input file astrix.in specifying parameters of the simulation. See the classes MeshParameter and SimulationParameter for details. Note that all parameters have to be present in the input file. For each test problem, run Astrix in the respective directory:

• blast/ : A one-dimensional problem of two interacting blast waves.
• cyl/ : supersonic flow around a cylinder.
• kh/ : Kelvin-Helmholtz instability.
• linear/ : A one-dimensional problem of a linear sound wave.
• noh/ : The Noh test problem.
• riemann/ : Two-dimensional Riemann problem.
• sod/ : A one-dimensional shock tube.
• source/ : Rayleigh-Taylor instability.
• vortex/ : Isentropic vortex test.

In addition, some scalar equation tests can be found in Astrix/run/scalar. A suite of test problems can be run by entering, in the Astrix directory:

python python/astrix/testsuite.py ./

which will generate a pdf document with outputs from most test problems.