High-performance implementations and large-scale validation of the link-wise artificial compressibility method

JOURNAL OF COMPUTATIONAL PHYSICS

卷:275

Article

Obrecht, Christian¹  Asinari, Pietro²  Kuznik, Frederic¹  Roux, Jean-Jacques¹ 

[1] Univ Lyon, UCB Lyon 1, CNRS, INSA Lyon,CHTHIL UMR 5008, F-69365 Lyon, France

[2] Politecn Torino, SMaLL, Dipartimento Energia, Turin, Italy

关键词: Computational fluid dynamics;    Link-wise artificial compressibility method;    High-performance computing;    Lid-driven cubic cavity;    CUDA;   

DOI  :  10.1016/j.jcp.2014.06.062

来源: Elsevier

【 摘 要 】

The link-wise artificial compressibility method (LW-ACM) is a recent formulation of the artificial compressibility method for solving the incompressible Navier-Stokes equations. Two implementations of the LW-ACM in three dimensions on CUDA enabled GPUs are described. The first one is a modified version of a state-of-the-art CUDA implementation of the lattice Boltzmann method (LBM), showing that an existing GPU LBM solver might easily be adapted to LW-ACM. The second one follows a novel approach, which leads to a performance increase of up to 1.8x compared to the LBM implementation considered here, while reducing the memory requirements by a factor of 5.25. Large-scale simulations of the lid-driven cubic cavity at Reynolds number Re = 2000 were performed for both LW-ACM and LBM. Comparison of the simulation results against spectral elements reference data shows that LW-ACM performs almost as well as multiple-relaxation-time LBM in terms of accuracy. (C) 2014 Elsevier Inc. All rights reserved.

【 授权许可】

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