Correlation between Temperature and Velocity Fluctuations in the Near-Wall Region of Rotating Turbulent Channel Flow  

作　　者：ANG Zi-Xuan CUI Gui-Xiang XU Chun-Xiao ZHANG Zhao-Shun SHAO Liang 杨子轩;崔桂香;许春晓;张兆顺;邵亮(Department of Engineering Mechanics,Tsinghua University,Beijing 100084;Laboratory of Fluid Mechanics and Acoustics,Ecole Centrale de Lyon,France)

机构地区：[1]Department of Engineering Mechanics,Tsinghua University,Beijing 100084 [2]Laboratory of Fluid Mechanics and Acoustics,Ecole Centrale de Lyon,France

出　　处：《Chinese Physics Letters》2012年第5期161-164,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11132005 and 10925210;the LIAMA Project TIPE。

摘　　要：The correlation between the temperature and streamwise velocity fluctuations in rotating turbulent channel flow is investigated.Unlike the previously found analogous property between the statistics of the temperature and streamwise velocity fluctuations,the correlation can more appropriately reveal the similarity between two random processes. The analysis of the correlation coefficient obtained from the database of direct numerical simulation indicates that the rotation weakens the correlation in most regions of the flow,especially on the suction side.Nevertheless,the correlation is slightly enhanced by the rotation in some regions of the rotating channel,which challenges the general understanding that rotation undoubtedly weakens the correlation.To discuss the mechanism of the rotating effect on the correlation,the transport equations of the variance of temperature and streamwise velocity fluctuations are considered. The Coriolis force is found to have an indirect effect on the correlation.

关 键 词：ROTATING ROTATION analogous 

分 类 号：O35[理学—流体力学]