[FLASH-USERS] OrszagTang test with USM solver

[Dominik Derigs]

Dear FLASH user's,

I'm trying to obtain 2D reference solutions using the USM solver shipped with FLASH v4.4.

Setup command: ./setup magnetoHD/Orszag -auto -2d +usm

I ran the simulation with the default flash.par file (increased lrefine_max to 6). However, the result is not what I expect to see.

The very same simulation can be computed just fine using the split MHD solver:
https://hera.ph1.uni-koeln.de/~derigs/OrszagTang2DUSM.png
https://hera.ph1.uni-koeln.de/~derigs/OrszagTang2DUSM.png
https://hera.ph1.uni-koeln.de/~derigs/OrszagTang2D8wave.png

Note that I also tested the Rotor test problem which was solved fine by both the USM and the split solver. The main difference between the initial conditions of both tests is presumably that the magnetic field in the Rotor is constant while the OrszagTang test has a spatially varying initial magnetic field.

I hope that someone has already seen a similar output and can give me a hint to the solution.

Best regards,
Dominik

--

Dominik Derigs
I. Physikalisches Institut
Universität zu Köln
Zülpicher Straße 77
50937 Köln
GERMANY
https://hera.ph1.uni-koeln.de/~derigs/

Tel. (+49|0) 221 470-8352
Fax. (+49|0) 221 470-5162


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