Numerical Simulation of CAARC Standard High-Rise Building Model Based on MRT-LBM Large Eddy Simulation

The calculation of wind load high-rise buildings depends on the pressure distribution data and coefficient outer surface building, but actual measurement is difficult to carry out. In order obtain effective building application extended lattice Boltzmann method (LBM) in resistance buildings, this paper, wall-adapting local eddy (WALE) model, dynamic Smagorinsky model (DSM), (SM) are embedded into LBM with multiple-relaxation-time (MRT) format. Three large simulation models, MRT-LBM-WALE, MRT-LBM-DSM, MRT-LBM-SM, which can simulate flow around a bluff body high Rayleigh number, constructed by using subgrid viscosity modify kinematic LBM. Finally, three turbulence models used analyze three-dimensional steady field single standard CAARC atmospheric boundary layer, numerical results analyzed compared tunnel test results. show that better reflects characteristics environment building. On windward side, it fits well crosswind side leeward between NPL TJ-2 subject positive pressure, highest at 2/3 height low both sides below. surfaces all under negative pressure. have little difference, provides basis for study buildings. It proved solutions good agreement experimental solutions, real near wall be obtained, accurately predict development turbulent flow.