Wind Pressure Distributions on Buildings obtained by LES with SGS models and Courant Numbers

Abstract

Numerical simulations using two types of subgrid-scale (SGS) models, Standard Smagorinsky model (SM model) and Coherent Structure Smagorinsky model (CSM model) for Large Eddy Simulation (LES) with different Courant numbers, were carried in a low-turbulence uniform flow for the rectangular and setback buildings. The CSM model gave more accurate results than the SM model for the setback building that has been observed on the sidewall of building with large negative pressures due to the strong coupling of the vortices. The large negative pressure coefficients are also changed by the Courant numbers.