Hi all,
As promised, I attach the TOV parfile (and Stampede job submission script) for the TOV test to this email. By default, the parfile sets GRHydro::riemann_solver = "Marquina"
but you can change this to HLLE by simply replacing "Marquina" with "HLLE".
Bruno G. and I have found that GRHydro and Whisky results are consistent with the Marquina solver. However, with WhiskyMHD, HLLE yields L2-norm Hamiltonian constraint violations that are roughly 50% lower than Marquina, but the improvement is much less with GRHydro.
-Zach
* * * Zachariah Etienne Assistant Professor of Mathematics West Virginia University
On Mon, Aug 18, 2014 at 12:06 PM, Peter Diener diener@cct.lsu.edu wrote:
Present:
Peter, Frank, Zach, Steve, Erik, Barry, Josh, Philipp, Ian.
Tickets:
1618: New patches available that includes naming changes. We looked over the ticket. Erik has some suggestions that he will add (in fact he already did) to the ticket.
1518: Roland committed the patch just before the call.
1648: After discussion Steve will make some changes and update the patch.
1651: Agree to apply the patch that makes it an error to use a variable value before setting it. Also add a more verbose error.
Git transition:
Barry summarized the e-mail he sent last night and encouraged people to take a look at the remaining issues (link to list provided in the e-mail).
It was suggested is to move the TAT thorns into CactusUtils and CactusElliptic (make the license compatible). Erik would like to have the 4 Carpet arrangements moved into 1 Carpet arrangement (just a move in Git). Thorns in arrangements that are not part of ET should stay where they are. Frank will provide a mapping for unknown usernames. Ignore old tags that can not be handled by Git.
Illinois code:
Constraint violations about a factor of 2 higher with GRHydro (when Marquina is used) compared to the Illinois code. Switching to HLLE improved the constraints by about 20%. Bruno did a test with Whisky and found consistent results with GRHydro for Marquina, but when switching to HLLE found Whisky to be consistent with the Illinois code and not with GRHydro. There may be an issue with HLLE in GRHydro.
Cheers,
Peter
Users mailing list Users@einsteintoolkit.org http://lists.einsteintoolkit.org/mailman/listinfo/users