ON THE MECHANISM OF TURBULENT COHERENT STRUCTURE (III)──A STATISTICAL AND DYNAMICALMODEL OF COHERENT STRUCTURE AND ITSHEAT TRANSFER MECHANISM

Applied Mathematics and Mechanics (English Edition) ›› 1998, Vol. 19 ›› Issue (8): 705-711.

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ON THE MECHANISM OF TURBULENT COHERENT STRUCTURE (III)──A STATISTICAL AND DYNAMICALMODEL OF COHERENT STRUCTURE AND ITSHEAT TRANSFER MECHANISM

卢志明, 刘宇陆

Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, P. R. China

收稿日期:1997-06-13 出版日期:1998-08-18 发布日期:1998-08-18

ON THE MECHANISM OF TURBULENT COHERENT STRUCTURE (III)──A STATISTICAL AND DYNAMICAL MODEL OF COHERENT STRUCTURE AND ITS HEAT TRANSFER MECHANISM

Lu Zhiming, Liu Yulu

Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, P. R. China

Received:1997-06-13 Online:1998-08-18 Published:1998-08-18

摘要/Abstract

摘要： Following Tsai & Ma^[1] and Tsai & Liu^[2], a statistical and dynamical near-wall turbulent coherent structural model with separate consideration of two different portions: locally generated and upstream-transported large eddies has been established.With this model, heat transfer in a fully developed open channel in the absence of pressure gradient is numerically simulated. Database of fluctuations of velocity and temperature has also been set. Numerical analysis shows the existence of high-low temperature streak caused by near-wall coherent structure and its swing in the lateral direction.Numerical results are in accordance with the computations and experimental results of other researchers.

关键词: coherent structure, statistical and dynamical model, heat transfer

Abstract: Following Tsai & Ma^[1] and Tsai & Liu^[2], a statistical and dynamical near-wall turbulent coherent structural model with separate consideration of two different portions: locally generated and upstream-transported large eddies has been established.With this model, heat transfer in a fully developed open channel in the absence of pressure gradient is numerically simulated. Database of fluctuations of velocity and temperature has also been set. Numerical analysis shows the existence of high-low temperature streak caused by near-wall coherent structure and its swing in the lateral direction.Numerical results are in accordance with the computations and experimental results of other researchers.

Key words: coherent structure, statistical and dynamical model, heat transfer

卢志明;刘宇陆. ON THE MECHANISM OF TURBULENT COHERENT STRUCTURE (III)──A STATISTICAL AND DYNAMICALMODEL OF COHERENT STRUCTURE AND ITSHEAT TRANSFER MECHANISM[J]. Applied Mathematics and Mechanics (English Edition), 1998, 19(8): 705-711.

Lu Zhiming;Liu Yulu . ON THE MECHANISM OF TURBULENT COHERENT STRUCTURE (III)──A STATISTICAL AND DYNAMICAL MODEL OF COHERENT STRUCTURE AND ITS HEAT TRANSFER MECHANISM[J]. Applied Mathematics and Mechanics (English Edition), 1998, 19(8): 705-711.

参考文献

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[9] Liu Yulu and Tsai Shutang, On the mechanism of turbulent coherent structure (II)──the physical model of the coherent structure for the rough boundary layer, Applied Mathematics and Mechanics (English Ed.) 17, 3 (1996), 197-203.
[10] N. Kasagi, Structural study of near-wall trubulence and its heat transfer mechanism,Near-Wall Turbulence 1988 Zoran Zaric Memorial Conference,edited by S.J. Kline and N. H. Afgan, Hemisphere Publshing Corporation (1990), 596-619.
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ON THE MECHANISM OF TURBULENT COHERENT STRUCTURE (III)──A STATISTICAL AND DYNAMICALMODEL OF COHERENT STRUCTURE AND ITSHEAT TRANSFER MECHANISM

ON THE MECHANISM OF TURBULENT COHERENT STRUCTURE (III)──A STATISTICAL AND DYNAMICAL MODEL OF COHERENT STRUCTURE AND ITS HEAT TRANSFER MECHANISM

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