Journal
ACTA ASTRONAUTICA
Volume 179, Issue -, Pages 20-32Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actaastro.2020.10.047
Keywords
Direct numerical simulation; Turbulence; Graphics processing unit; Parallel; Shock wave boundary layer interference
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This paper proposes a parallel algorithm based on multiple graphics processing units to improve parallel efficiency in large-scale grid computing, verifies the accuracy and feasibility of the algorithm, and applies it to direct numerical simulation of shock wave boundary layer interference research.
In order to efficiently perform the direct numerical simulation for shock wave boundary layer interference, a large grid computing scale is needed, and a single graphics processing unit cannot meet the urgent needs of computing. This paper proposes a parallel algorithm based on the architecture of multiple graphics processing units to effectively deal with the direct numerical simulation for shock wave boundary layer interference. The algorithm achieves a high overlap between graphics processing unit computation and boundary data exchange to improve the parallel efficiency when the grid computing scale is large. The working principle of the multigraphics-processing-unit parallel algorithm is introduced, and the accuracy and feasibility of the algorithm are verified. Finally, through the application of the algorithm in the research of the compression-expansion slope boundary layer, fine flow structures such as large-scale vortex structure, shocklet, and attached shock wave can be captured. As a conclusion, the multi-graphics-processing-unit parallel algorithm proposed in this paper can accurately display the flow field of shock wave boundary layer interference.
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