Technology for Supercomputer Simulation of Turbulent Flows in the Good New Days of Exascale Computing
DOI:
https://doi.org/10.14529/jsfi210401Keywords:
computational fluid dynamics, turbulent flows, scale-resolving simulation, hybrid RANS-LES approach, CPU GPU, MPI OpenMP OpenCLAbstract
A technology for scale-resolving simulations of turbulent flows in the problems of aerodynamics and aeroacoustics is presented. It is based on the higher accuracy numerical schemes on unstructured mixed-element meshes and latest non-zonal hybrid approaches combining Reynoldsaveraged Navier – Stokes (RANS) and Large eddy simulation (LES) methods for turbulence modeling. It targets a wide range of high performance computing (HPC) systems, from a compute server or small cluster to an exascale supercomputer. The advantages of the key components of the technology are summarized. These key components are a hybrid RANS-LES turbulence modeling method, a numerical scheme for discretization in space, a parallel algorithm, and a portable software implementation for modern hybrid systems with extra massive parallelism. Examples of our simulations are given and parallel performance on various HPC systems is presented.
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