GTC-DC 2019: Landing on Mars: Petascale Unstructured Computational Fluid Dynamics on Summit
Aaron Walden, NASA Langley Research Center
We’ll discuss the plan for the human exploration of Mars, which will require the retropropulsive deceleration of payloads. Conventional computational capabilities don’t allow for the simulation of interactions between the atmosphere and retropropulsion exhaust plumes at sufficient spatial resolution to resolve governing phenomena with a high level of confidence. Researchers from NASA Langley and Ames Research Centers, NVIDIA Corporation, and Old Dominion University have developed a GPU-accelerated version of Langley's FUN3D flow solver. An ongoing campaign on the Summit supercomputer at Oak Ridge National Lab is using this capability to apply detached eddy simulation methods to retropulsion in atmospheric environments for nominal operation of a human-scale Mars lander concept. We’ll give an overview of the Mars lander fluid dynamics project, the history and details of FUN3D GPU development, and the optimization and performance of the code on emerging HPC architectures.