[Users] question about MHD tests for GRHydro

[Bruno Coutinho Mundim]

Hi Bruno:

Bruno Giacomazzo wrote:
> Hi,
> 	I have some questions about the MHD version of GRHydro. Today I had a business meeting at the time of the telecon, otherwise I'd have asked them during the telecon. 
> 
> 	It is my understanding that the next release of the ET will happen next week and it will contain MHD. Did you do already some tests in GR? Did you try the evolution of BNS with magnetic fields? 

We are still working on it. So I will have to answer you later on this.


I'd like to try to run the code with magnetized BNS and see how it 
compares with Whisky.

Surely! As soon as we get it tested, we can do a comparison.

As some of you know in the past I had problems with divergence cleaning 
(DC) when evolving BNS (strong violations of divB after the merger when 
the BH and the torus are formed when using AMR) and so I'm curious to 
see if the implementation of DC in GRHydro is more robust than the one I 
have in Whisky.
> 
All I can say now is that the divergence cleaning implementation is
doing a good job of dumping and advecting away the divB violations.
I will get back to you, probably in the workshop, when the most
stringent tests are done.

Cheers,
Bruno.

> Thanks,
> Bruno
> 
> P.S.: I will try to join the next ET telecon, so that I can get an update before coming to LSU.
> 
> Dr. Bruno Giacomazzo
> JILA - University of Colorado
> 440 UCB
> Boulder, CO 80309
> USA
> 
> Tel.  : +1 303-492-0389
> Fax  : +1 303-492-5235
> email : bruno.giacomazzo at jila.colorado.edu
> web: http://www.brunogiacomazzo.org
> 
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