Scientific Computing Group Seminars - Detail View

Speaker: M Tiglio

Affiliation: University of Maryland

Talk Title: Binary black holes: numerics and GPU computing

Invited by: Jan S Hesthaven

Time: Dec. 04 2009 11 a.m.

Location: 182 George Street, Room 110

Abstract:

I will review a long term project to numerically solve Einstein's equations in complex geometries using a high order multi-patch approach. I will first discuss the numerical techniques currently used, based on new, highly optimized operators satisfying Summation by Parts and a penalty technique to communicate patches while ensuring numerical stability for a large class of problems. I will then show that the approach scales almost perfectly for thousands of cores, followed by the results of some binary black hole simulations using all the above machinery. Finally, I will discuss ongoing effort in using Graphics Processing Units (more broadly, heterogeneous computing) in Numerical Relativity, and some preliminary results, which include a 50-100x speedup in some applications, as well as some large scale Montecarlo sampling of the binary black hole problem in the so-called Post-Newtonian approximation.