2D Field Loop Advection

Background on the problem

For Background and problem setup see ​http://www.astro.virginia.edu/VITA/ATHENA/field-loop.html

And for a movie of what the solution should look like see ​http://www.youtube.com/watch?v=ztaoT1yPloc

Details of test

This test is run in order to verify that the ConstrainedTransport method to evolve magnetic fields is working correctly.

Since this problem should evolve in a well-defined way, any major deviations from this evolution signal a possible bug somewhere in one or more of the integration schemes.

Results

AstroBEAR should complete each of the subtests (one for each Ao) successfully.

This is determined by the state of the system at the end of the simulation having a relative error with respect to the analytic solution not being greater than 1% .

Chombo	Ao=1e-3	Ao=1e-4	Ao=1e-5
Reference
Current

​Test Log