ティアドロップディンプル傾斜角度と配列がディンプル面の熱伝達特性に与える影響の LES 解析

（層流域と乱流域での評価）

抄録

Large Eddy Simulation (LES) of channel flow with dimples on one side was performed. Four geometries of dimpled surface were examined: spherical dimple, teardrop-shaped dimple without inclination, and 30deg inclined teardrop-shaped dimple with in-line and staggered arrangements. Subgrid-scale model of LES was a dynamic Lagrangian model. The present results showed flow structure such as flow separation, reattachment, and circulation over dimpled surfaces. The three cases of the teardrop-shaped dimples showed higher Nusselt number than the spherical dimple case. 30deg inclined in-line case showed the highest Nusselt number, which was 18% higher than the spherical dimple case .