Performance Enhancements for the Lattice-Boltzmann Solver in the LAVA FrameworkPerformance enhancements in NASA's recently developed Lattice Boltzmann solver within the Launch Ascent and Vehicle Aerodynamics (LAVA) framework are presented. Two key algorithmic developments are highlighted. A coarse-fine interface treatment that discretely conserves mass and momentum has been implemented and successfully verified and validated. Code optimizations targeting improved serial and parallel performance were presented. For a simple turbulent Taylor-Green Vortex problem, we were able to demonstrate a 2.3 times speedup over the baseline code for a single Skylake-SP node containing 40 physical cores, and a 2.14 times speedup for 64 nodes containing 2560 physical cores. In addition, we were able to show that the optimizations enabled us to scale the code almost perfectly to 20480 physical cores where, including ghost cells, the problem size was 10 billion cells.
Document ID
20180007951
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Barad, Michael (NASA Ames Research Center Moffett Field, CA, United States)
Kocheemoolayil, Joseph (Science and Technology Corp. Moffett Field, CA, United States)
Stich, Gerrit (Science and Technology Corp. Moffett Field, CA, United States)
Kiris, Cetin (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
November 30, 2018
Publication Date
July 9, 2018
Subject Category
Numerical AnalysisAerodynamicsComputer Operations And Hardware