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Article Dans Une Revue Journal of Computational Physics Année : 2014

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

Christian Obrecht
Frédéric Kuznik
Jean-Jacques Roux

Résumé

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 1.8× 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=2000Re=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.
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Dates et versions

hal-01059217 , version 1 (29-08-2014)

Identifiants

  • HAL Id : hal-01059217 , version 1

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Christian Obrecht, Pietro Asinari, Frédéric Kuznik, Jean-Jacques Roux. High-performance implementations and large-scale validation of the link-wise artificial compressibility method. Journal of Computational Physics, 2014, 275 (15), pp.143-153. ⟨hal-01059217⟩
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