粗面を有する三次元丘陵地まわりの強風乱流へのLESの適用

概要

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The purpose of this paper is to investigate the effect of the roughness of the ground surface on the flow around a 3D steep hill in boundary-layer turbulence by LES analysis. First, we confirm that the present LES method with very small numerical dissipation can simulate the flow around a 3D steep hill with smooth surface of the ground in boundary-layer turbulence. Next, we introduce roughness blocks which are modeled by Goldstein's immersed boundary method, and then validate the present LES method about the roughness effects on the flow characteristics around a 3D steep hill through the comparison of the computational results with the experimental data. Finally the effects of the roughness of the ground surface on the wake structure of the 3D steep hill are discussed by use of the computational flow visualization technique.
社団法人日本建築学会の論文
2006-08-30