On 3/4/2021 10:37 AM, Gabella, William E wrote: > Present: Peter D, Bill G, Roland H, Atul K, Miguel G, Steve B, Karim S > > Chair: Peter, Minutes: Bill > > * SPEC benchmark contribution > [https://bitbucket.org/einsteintoolkit/tickets/issues/2470 task] [RH, SB] > > Roland, Sent the Makefile to the person at NVidia and a second version that > is not sent yet, it is a little nicer. PUGH run with 8th order finite > difference and > seems to run really slow. Not sure about how long the run the SPEC want. > Decided as a test case not to use Minkowski ST too man zeros, so put in > a shifted > gauge wave. Started with Maclachlan with gamma driver and 1+log lapse > (black > hole driver) and periodic BCs and seems unstable, the amplitude of the > wave grows. > Benchmark parameter file chooses the number of cells and the time steps, > did > satisfy the Courant condition, it is smaller than 0.4 (that is the > gallery example), > even smaller shows the same growth.
This may not be an original thought, but it occurs to me that figuring out a better gauge condition might be a good application for machine learning, since it's not terribly important that we understand how the gauge works, just that it behaves the way we want. --Steve _______________________________________________ Users mailing list [email protected] http://lists.einsteintoolkit.org/mailman/listinfo/users
