Numerical Simulation of Three-Dimensional Incompressible Turbulent Flows Using Lattice Boltzmann Method

摘要

Numerical simulation using the lattice Boltzmann Method is presented for three-dimensional decaying homogeneous isotropic turbulence. Fifteen-velocity cubic lattice model is used for the simulation.The LBGK method is able to reproduce the dynamic of decaying turbulence and could be an alternative for solving the Navier-Stokes equations. The lattice Boltzmann method is parallelized by using domain decomposition and implemented on a distributed memory computer, Hitachi SR2201. It is found that the larger the number of subdomains, the worse the parallel efficiency because of the data communication. Further investigation is needed on the accuracy and efficiency of cubic LBGK method.