Dear ET folks,
We (the Illinois Relativity group) have been following the ET mailing list with great interest since its inception and were planning to send representatives to the upcoming ET workshop. Sadly, we will be too busy preparing for the Midwest Relativity Meeting, which we are hosting the following weekend.
We noticed that there is some interest in implementing a vector potential-based GRMHD algorithm in ET. Were we able to attend the upcoming ET workshop to discuss this topic with you, we would have shared some recent improvements to our vector potential-based GRMHD algorithm, in the hope that the ET community might benefit.
As many of you know, we currently evolve the vector potential to perform GRMHD simulations with divergence-free magnetic fields. We found some major problems with our original implementation when evolving magnetized binary inspirals, such as BHNS inspirals. We discovered that the problems were due to a zero-speed EM gauge mode, and after switching to another (Lorenz) EM gauge, we find huge improvements.
We recently posted a paper summarizing our findings at: http://arxiv.org/abs/1110.4633
All the best,
Zach Etienne Yuk Tung Liu Vasilis Paschalidis Stu Shapiro
Dear Zach,
On Mon, Oct 24, 2011 at 11:37:01AM -0500, Zach Etienne wrote:
We (the Illinois Relativity group) have been following the ET mailing list with great interest since its inception and were planning to send representatives to the upcoming ET workshop. Sadly, we will be too busy preparing for the Midwest Relativity Meeting, which we are hosting the following weekend.
That is too bad indeed. We should find another opportunity in the future.
As many of you know, we currently evolve the vector potential to perform GRMHD simulations with divergence-free magnetic fields. We found some major problems with our original implementation when evolving magnetized binary inspirals, such as BHNS inspirals. We discovered that the problems were due to a zero-speed EM gauge mode, and after switching to another (Lorenz) EM gauge, we find huge improvements.
We recently posted a paper summarizing our findings at: http://arxiv.org/abs/1110.4633
Would you be interested to summarize and discuss these results within an Einstein Toolkit call? We usually use plain phone for the calls, but would use evo as second option for opportunities like this, and we would announce it accordingly.
The call is always open to the public anyway - please feel free to call in. The next call will be Mon Nov 7th, at 10am central time, and usually an announcement is sent the day before.
Frank
Dear Frank,
Thank you for your kind reply.
2011/10/25 Frank Loeffler knarf@cct.lsu.edu
Would you be interested to summarize and discuss these results within an Einstein Toolkit call? We usually use plain phone for the calls, but would use evo as second option for opportunities like this, and we would announce it accordingly.
We would be happy to participate in the Einstein Toolkit conference call on
Nov 7 and discuss the paper, as well as our experience with GRMHD. Please provide instructions for connecting to the EVO telecon.
All the best,
Zach Etienne Yuk Tung Liu Vasilis Paschalidis Stu Shapiro
2011/10/25 Frank Loeffler knarf@cct.lsu.edu
Dear Zach,
On Mon, Oct 24, 2011 at 11:37:01AM -0500, Zach Etienne wrote:
We (the Illinois Relativity group) have been following the ET mailing
list
with great interest since its inception and were planning to send representatives to the upcoming ET workshop. Sadly, we will be too busy preparing for the Midwest Relativity Meeting, which we are hosting the following weekend.
That is too bad indeed. We should find another opportunity in the future.
As many of you know, we currently evolve the vector potential to perform GRMHD simulations with divergence-free magnetic fields. We found some
major
problems with our original implementation when evolving magnetized binary inspirals, such as BHNS inspirals. We discovered that the problems were
due
to a zero-speed EM gauge mode, and after switching to another (Lorenz) EM gauge, we find huge improvements.
We recently posted a paper summarizing our findings at: http://arxiv.org/abs/1110.4633
Would you be interested to summarize and discuss these results within an Einstein Toolkit call? We usually use plain phone for the calls, but would use evo as second option for opportunities like this, and we would announce it accordingly.
The call is always open to the public anyway - please feel free to call in. The next call will be Mon Nov 7th, at 10am central time, and usually an announcement is sent the day before.
Frank
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Zach Etienne