A parallel lattice Boltzmann method for large eddy simulation on multiple GPUs

Qinjian Li, Chengwen Zhong*, Kai Li, Guangyong Zhang, Xiaowei Lu, Qing Zhang, Kaiyong Zhao, Xiaowen CHU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

To improve the simulation efficiency of turbulent fluid flows at high Reynolds numbers with large eddy dynamics, a CUDA-based simulation solution of lattice Boltzmann method for large eddy simulation (LES) using multiple graphics processing units (GPUs) is proposed. Our solution adopts the "collision after propagation" lattice evolutionway and puts the misaligned propagation phase at global memory read process. The latest GPU platform allows a single CPU thread to control up to four GPUs that run in parallel. In order to make use of multiple GPUs, the whole working set is evenly partitioned into sub-domains. We implement Smagorinsky model and Vreman model respectively to verify our multi-GPU solution. These two LES models have different relaxation time calculation behavior and lead to different CUDA implementation characteristics. The implementation based on Smagorinsky model achieves 190 times speedup over the sequential implementation on CPU,while the implementation based on Vreman model archives more than 90 times speedup. The experimental results show that the parallel performance of our multi-GPU solution scales very well on multiple GPUs. Therefore large-scale (up to 10,240 × 10,240 lattices) LES-LBM simulation becomes possible at a low cost, even using double-precision floating point calculation.

Original languageEnglish
Pages (from-to)479-501
Number of pages23
JournalComputing (Vienna/New York)
Volume96
Issue number6
DOIs
Publication statusPublished - Jun 2014

Scopus Subject Areas

  • Software
  • Theoretical Computer Science
  • Numerical Analysis
  • Computer Science Applications
  • Computational Theory and Mathematics
  • Computational Mathematics

User-Defined Keywords

  • CUDA
  • GPU Computing
  • Large eddy simulation
  • Lattice Boltzmann method

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