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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/98736

    Title: Simulation of turbulent flows around a prism in suburban terrain inflow based on random flow generation method
    Authors: Li, Yi-Chao;Cheng, Chii-Ming;Zheng, De-qian;Lo, Yuan-Lung;Fang, Fuh-Min;Wang, Chia-Kuo
    Contributors: 淡江大學土木工程學系
    Keywords: random flow generation;LES
    Date: 2014-06
    Issue Date: 2014-09-18 14:20:13 (UTC+8)
    Abstract: 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.
    Relation: Proceedings of 6th International Symposium on Computational Wind Engineering
    Appears in Collections:[Graduate Institute & Department of Civil Engineering] Proceeding

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