Abstract:
Based on the Fluent fluid calculation platform, the self-editing UDF program is used to simulate the roughness according to the roughness length. Taking Askervein Mountain as an example, different turbulence models are selected to simulate the wind field. Compared with the measured data, The influence of turbulence model on CFD simulation of complex terrain wind field is studied, and the applicability of turbulence model is analyzed. The effect of single roughness length is further discussed. The results show that Compared with other turbulence models, LES simulation has higher precision, and is more suitable for wind field simulation of complex terrain. The influence of surface roughness length on the wind field shows great difference in the windward and leeward planes, and reasonable setting of a single surface roughness can effectively reduce the simulation error.