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

21st Fluid Mechanics Conference

物理学;力学

Kajzer, A.^1 ; Pozorski, J.^1 ; Szewc, K.^1

Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Gdan´sk, Poland^1

关键词: Comparative studies;    Computational approach;    Implementation difficulties;    Lattice boltzmann methods (LBM);    Smoothed particle hydrodynamics;    Spatial resolution;    Taylor-Green vortex;    Turbulent energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/530/1/012019/pdf
DOI  :  10.1088/1742-6596/530/1/012019

学科分类：力学，机械学

来源: IOP

【 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.