High Resolution Aerospace Applications using the NASA Columbia Supercomputer Session: High End Computing Applications Event Type: Paper Time: 4:00pm - 4:30pm Session Chair: Esmond G Ng Speaker(s): Dimitri J. Mavriplis, Michael J. Aftosmis, Marsha Berger Location: 606-607 Abstract: This paper focuses on the parallel performance of a high-fidelity, unstructured, Reynolds-averaged Navier-Stokes solver, and a fully-automated inviscid flow solver for cut-cell Cartesian grids, on the newly installed NASA Columbia supercomputer. We envision the complementary use of these two codes for characterization of aerospace vehicle design performance over the entire flight envelope through extensive parametric analysis. Both packages are industrial-level codes designed for complex geometry and incorporate customized multigrid solution algorithms. The performance of these codes on Columbia is examined using both MPI and OpenMP and using both the NUMAlink and InfiniBand interconnect fabrics. Numerical results demonstrate good scalability on up to 2016 cpus using the NUMAlink4 interconnect, with measured computational rates in the vicinity of 3 TFLOP/s, while InfiniBand showed some performance degradation at high CPU counts, particularly with multigrid. Nonetheless, the results are encouraging enough to indicate that larger test cases using combined MPI/OpenMP communication should scale well on even more processors. Awards: Best Paper Nomination This paper can be found in the ACM and IEEE Digital Libaries Click here for ACM Click here for IEEE Chair/Speaker Details: Esmond G Ng (Chair) Lawrence Berkeley National Laboratory Dimitri J. Mavriplis University of Wyoming Michael J. Aftosmis NASA Ames Research Center Marsha Berger Courant Institute