Document Type

Journal Article

Department/Unit

Department of Computer Science

Title

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

Language

English

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. © Springer-Verlag Wien 2014.

Keywords

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

Publication Date

2014

Source Publication Title

Computing

Volume

96

Issue

6

Start Page

479

End Page

501

Publisher

Springer Verlag

DOI

10.1007/s00607-013-0356-7

Link to Publisher's Edition

http://dx.doi.org/10.1007/s00607-013-0356-7

ISSN (print)

0010485X

ISSN (electronic)

14365057

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