Abstract
This paper presents a lattice Boltzmann method (LBM) for incompressible flow simulation applicable to complicated flow domain using unstructured triangular mesh. The LBM simulates microscopic collision and streaming of fluid particle and evaluated the macroscopic velocity and pressure from the computed particle distribution. For the computation of collision step, the 2-dimensional 9-speed lattice BGK model was employed as a collision operator. For the streaming step, the cubic interpolation scheme based on CIVA was employed to interpolate the particle distribution function. The present method was applied to the analysis of the square driven cavity flow and the flow past a circular cylinder.
