TURBULENT OPEN CHANNEL FLOW SUBJECTED TO THE CONTROL OF A SPANWISE TRAVELING WAVE  

作　　者：LIU Nan-sheng WANG Lei LU Xi-yun 

机构地区：[1]Department of Modem Mechanics, University of Science and Technology of China, Hefei 230026, China

出　　处：《Journal of Hydrodynamics》2009年第1期65-70,共6页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos 90405007, 10772173 and 90605005);the Program for Cheung Kong Scholars and Innovative Research Team in the University;the Science and Technology Innovative Foundation of the Chinese Academy of Sciences (Grant No CXJJ-237);the Anhui Provincial Excellent Young Scholars Foundation (Grant No 08040106826)

摘　　要：Turbulent open channel flows subjected to the control of a spanwise traveling wave have been investigated by means of Direct Numerical Simulation （DNS）. The objective of this study is to reveal the response of the near-wall and surface-influenced turbulence to the spanwise traveling wave control. Three typical frequencies of the spanwise traveling wave, i.e., high-, middle- and low-frequency, corresponding to the exciting periods at 25, 50 and 100, are considered to study the turbulence dynamics in the wall and surface regions. To elucidate the behaviors of turbulence statistics, some typical quantities, including the mean velocity, velocity fluctuations and the structures of turbulence fluctuations, are exhibited and analyzed.Turbulent open channel flows subjected to the control of a spanwise traveling wave have been investigated by means of Direct Numerical Simulation （DNS）. The objective of this study is to reveal the response of the near-wall and surface-influenced turbulence to the spanwise traveling wave control. Three typical frequencies of the spanwise traveling wave, i.e., high-, middle- and low-frequency, corresponding to the exciting periods at 25, 50 and 100, are considered to study the turbulence dynamics in the wall and surface regions. To elucidate the behaviors of turbulence statistics, some typical quantities, including the mean velocity, velocity fluctuations and the structures of turbulence fluctuations, are exhibited and analyzed.

关 键 词：turbulent open channel flow traveling wave Direct Numerical Simulation （DNS） turbulence statistics turbulence structures 

分 类 号：O327[理学—一般力学与力学基础] O357.5[理学—力学]