On Turbulent Contribution to Frictional Drag in Wall-Bounded Turbulent Flow
LI Feng-Chen1,2, KAWAGUCHI Yasuo3, HISHIDA Koichi4, OSHIMA Marie2
1School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001
2Institute of Industrial Science, The University of Tokyo,Komaba 4-6-1, Meguro-ku, Tokyo 153-8505, Japan
3Department of Mechanical Engineering, Tokyo University of Science, Yamazaki 2641, Noda, Chiba 278-8510, Japan
4Department of System Design Engineering, Keio University, Yokohama 223-8522, Japan
On Turbulent Contribution to Frictional Drag in Wall-Bounded Turbulent Flow
LI Feng-Chen1,2;KAWAGUCHI Yasuo3;HISHIDA Koichi4;OSHIMA Marie2
1School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001
2Institute of Industrial Science, The University of Tokyo,Komaba 4-6-1, Meguro-ku, Tokyo 153-8505, Japan
3Department of Mechanical Engineering, Tokyo University of Science, Yamazaki 2641, Noda, Chiba 278-8510, Japan
4Department of System Design Engineering, Keio University, Yokohama 223-8522, Japan
Abstract： We propose a simple model for turbulent contribution to the frictional drag in a wall-bounded turbulent flow based on the characteristic parameters of turbulent bursting events. It is verified on water and drag-reducing surfactant solution flows investigated by particle image velocimetry in experiments. It is obtained that the turbulent contribution to the skin friction factor is linearly proportional to the product of the spatial frequency and strength of turbulent bursts originated from the wall.
2006, Vol. 23 
