225 LES analysis of the turbulent flow characteristic near the building(The full-scale simulation of a turbulent boundary layer flow in a wind tunnel)

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  • 225 建物近傍の乱流特性に関するLES解析(乱流境界層風洞のフルスケールシミュレーション)(OS-5 環境負荷ミニマイズのための熱流体・環境工学の展開(4))

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Recently the environmental assessment for the air quality in a city area becomes increasingly important with the introduction of distributed power generation systems. Though Large Eddy Simulation will be the most effective technique to predict complex flow field over such a building area, it is necessary to give an unsteady flow at the inflow boundary, and it is important problem itself. In this study a series of numerical simulation was executed to simulate air flow observed in wind tunnel experiment by using spire-roughness method, and the influence of the inflow property to the turbulence statistics around a cubic building were investigated. Consequently, the low frequency of the inflow plays especially important role for the prediction of the turbulent characteristics above the building height.

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