On the Comparison Between Lattice Boltzmann Methods and Spectral Methods for DNS of Incompressible Turbulent Channel Flows on Small Domain Size

Liren Li; Yipeng Shi; Shengqi Zhang; Lian-Ping Wang; Zhenhua Xia

doi:10.4208/aamm.2018.s04

On the Comparison Between Lattice Boltzmann Methods and Spectral Methods for DNS of Incompressible Turbulent Channel Flows on Small Domain Size

Authors

Liren Li
Yipeng Shi
Shengqi Zhang
Lian-Ping Wang
Zhenhua Xia

DOI:

https://doi.org/10.4208/aamm.2018.s04

Keywords:

Lattice Boltzmann method, Spectral method, turbulent channel flows.

Abstract

The paper presents a study of the influence of the domain size and LBM collision models on fully developed turbulent channel flows. The results using spectral method show that a smaller domain size will increase the velocity fluctuations in the streamwise direction. And MRT-LBM with different collision models gives reliable results at least for low order flow statistics compared with those from spectral method and finite-difference method.