In this study, the modified discretizing and synthesizing random flow generation (MDSRFG) was adopted to generate an anisotropic boundary layer inlet for Large-eddy simulation. The statistical quantities including mean velocity, turbulence intensity, and turbulence length scale of inlet were defined by the measurements of suburban terrain at TKU BL-1 wind tunnel. The target spectra were also defined by von Kármán models. Results showed that the turbulence energy can be maintained from the inlet to the downstream position. Comparison of aerodynamic coefficient between simulation and experiments yielded consistent results. A square pressure model with aspect ratio h/D=3 was established for validation. The mean and fluctuating pressure distributions of simulation also showed good agreements with experiments. The result indicated that adopting a reasonable process in the MDSRFG method can be an effective numerical tool for generating a spatially correlated atmospheric boundary layer flow field.
關聯:
Proceedings of 6th International Symposium on Computational Wind Engineering
