PARALLEL IMPLEMENTATION OF THE HYBRID LATTICE BOLTZMANN METHOD ON GRAPHICS ACCELERATORS

An analysis has been conducted for the computational performance of a hybrid mathematical model for investigating the laws of thermogravitational fl ows. Hydrodynamic processes were calculated using mesoscopic lattice Boltzmann equations, and thermodynamic processes were described on the basis of a fi nite-diff erence solution of a macroscopic energy equation. It has been established that scheme D3Q19 and D3Q27-based hybrid mesomacroscopic models reproduce identical fi elds of thermohydrodynamic characteristics. In this case, the velocity of calculating nineteenand twenty seven-velocity topologies diff ers insignifi cantly at a grid density lower than 201³ . Subsequently, the superiority of model D3Q19 over model D3Q27 in terms of computational performance.
   
Author:  A. É. Nee
Keywords:  hybrid lattice Boltzmann method, graphics accelerator, fi nite-diff erence method, natural convection.
Page:  1044