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DOE OSTI · 2572333

Energy Exascale Computational Fluid Dynamics Simulations With the Spectral Element Method

Merzari, Elia·Coppo Leite, Victor·Fang, Jun·Shaver, Dillon·Min, Misun·Kerkemeier, Stefan·Fischer, Paul·Tomboulides, Ananias
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Abstract

Development and application of the open-source GPU-based fluid-thermal simulation code, NekRS, are described. Time advancement is based on an efficient kth-order accurate timesplit formulation coupled with scalable iterative solvers. Spatial discretization is based on the high-order spectral element method (SEM), which affords the use of fast, low-memory, matrix-free operator evaluation. Further, recent developments include support for nonconforming meshes using overset grids and for GPU-based Lagrangian particle tracking. Results of large-eddy simulations of atmospheric boundary layers for wind-energy applications as well as extensive nuclear energy applications are presented.

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Merzari, Elia, Coppo Leite, Victor, Fang, Jun, Shaver, Dillon, Min, Misun, Kerkemeier, Stefan, Fischer, Paul, Tomboulides, Ananias. 2024-02-22. Energy Exascale Computational Fluid Dynamics Simulations With the Spectral Element Method. https://doi.org/10.1115/1.4064659

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