高精度・保存的流体計算法の耐風問題への適用性について : その3 都市域乱流境界層における高層建築物まわりの気流と風圧力の解析

概要

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In the case of the wind resistant problems and environmental problems of buildings, we have to consider the effect of turbulence characteristics. Therefore, it is important for numerical simulations as well as wind tunnel experiments to give a velocity profile and turbulence intensity to the approaching flow conditions similar to natural wind. Here, we try to provide the numerical technique for generation of inflow turbulence by DNS (Direct Numerical Simulation) of turbulent boundary layer on a plate. In this study, we employ the interpolation method with the periodic boundary condition in order to simulate fully developed turbulent boundary layer. We investigate the inflow profile and its turbulence characteristics on the basis of the number and density of the roughness blocks. It is shown that we can control the generation of wind data by adjusting above parameters. Also, we apply this generation technique to the flow simulation around 3D square cylinder in turbulent boundary layer. Comparing the flows and wind pressure in a boundary layer velocity field with those in a constant velocity field, we discuss the turbulence effects on the aerodynamics of high-rise building.
社団法人日本建築学会の論文
2000-12-30