Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 22, 2016 - October 23, 2016
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 .
