Large-eddy simulations of 3D Taylor-Green vortex:comparison of Smoothed Particle Hydrodynamics, Lattice Boltzmann and Finite Volume methods

摘要

In the paper we present Large-eddy simulation (LES) results of 3D Taylor- Green vortex obtained by the three different computational approaches:Smoothed Particle Hydrodynamics (SPH), Lattice Boltzmann Method (LBM) and Finite Volume Method (FVM).The Smagorinsky model was chosen as a subgrid-scale closure in LES for all considered methods and a selection of spatial resolutions have been investigated.The SPH and LBM computations have been carried out with the use of the in-house codes executed on GPU and compared, for validation purposes, with the FVM results obtained using the open-source CFD software OpenFOAM.A comparative study in terms of one-point statistics and turbulent energy spectra shows a good agreement of LES results for all methods.An analysis of the GPU code efficiency and implementation difficulties has been made.It is shown that both SPH and LBM may offer a significant advantage over mesh-based CFD methods.