Numerical prediction of flow around a building with various turbulence models: comparison of k-ε EVM, ASM, DSM, and LES with wind tunnel tests

The accuracy of numerical predictions based on large eddy simulation (LES), the differential stress model (DSM), the algebraic stress model (ASM), and the standard k-ε eddy viscosity model (k-ε EVM) is examined for the turbulent flow field around a building. Here, a surface-mounted cube is used as the model of a building. The accuracy and relative performance of these four turbulence models are assessed by comparing them with experimental data. The differences between the results given by these turbulence models are examined by comparing the distribution of velocity vectors, mean pressure coefficients (C_p), turbulence energy (k), turbulence production (P_k), and normal stress components ( 〈u′_iu′_i〉 ), etc.