湍流相干结构机理研究(Ⅲ)——湍流拟序结构的统计及动力模型及其对传热影响研究

卢志明; 刘宇陆

湍流相干结构机理研究(Ⅲ)——湍流拟序结构的统计及动力模型及其对传热影响研究

上海大学, 上海市应用数学和力学研究所, 上海 200072

详细信息

中图分类号: O213;O357.5
计量
- 文章访问数: 2639
- HTML全文浏览量: 118
- PDF下载量: 983
- 被引次数: 0
出版历程
- 收稿日期: 1997-01-13
- 刊出日期: 1998-08-15

On the Mechanism of Turbulent Coherent Structure (Ⅲ)——A Statistical and Dynamical Model of Coherent Structure and Its Heat Transfer Mechanism

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

摘要

摘要: 在文献[1]、[2]的启发下,本文建立一个零压梯度下,考虑局部产生以及外来扰动涡旋的壁湍流边界层大涡拟序结构的统计及动力学模型.在此基础上对充分发展的宽明渠流动中壁面附近的热扩散进行了数值模拟,建立了边界层拟序脉动速度和温度的数据库,发现了与速度快慢条相对应的高低温流条及其随时间在展向的摆动.数值模拟结果与前人的计算和实验结果吻合很好.
- 相干结构 /
- 统计及动力学模型 /
- 热扩散
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 up-stream 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.
- coherent structure /
- statistical and dynamical model /
- heat transfer

HTML全文

参考文献(12)

[1]	蔡树棠、麻柏坤,大小涡旋分开考虑的模式理论,应用数学和力学,8(10)(1987),849-858.
[2]	蔡树棠、刘宇陆,《湍流理论》,上海交通大学出版社(1993).
[3]	S.K.Robinson,Coherent motions in the turbulent boundary layer,Annu.Rev.Fluid Mech.,23(1991),601-639.
[4]	罗纪生、周恒,湍流边界层相干结构的一个理论模型,应用数学和力学,14(11)(1993),939-947.
[5]	周恒、熊忠民,湍流边界层近壁区相干结构起因的研究,中国科学,A辑,24(9)(1994),941-948.
[6]	熊忠民,湍流边界层中的相干结构及其传热机理的研究,博士学位论文,天津大学力学系(1994).
[7]	马峥,湍流研究的两个问题,博士学位论文,天津大学力学与工程测试系(1996).
[8]	蔡树棠、刘宇陆,湍流相干结构机理研究(Ⅰ)——光滑壁边界层相干结构的物理模型,应用数学和力学,16(4)(1995),301-305.
[9]	刘宇陆、蔡树棠,湍流相干结构机理研究(Ⅱ)——粗糙壁边界层相干结构的物理模型,应用数学和力学,17(3)(1996),189-195.
[10]	N.Kasagi,Structural study of near-wall trubulence and its heat transfer mechanism,Near-Wall Turbulence 198Zoran Zaric Memorial Conference,edited by S.J.Kline and N.H.Afgan, Hemisphere Publishing Corporation(1990),596-619.
[11]	P.Bradshaw,-Inactive.motion and pressure fluctuations in turbulent boundary layers,J.F.M.,30(1967),241-258.
[12]	D.M.Bell and J.H.Ferziger,Turbulent boundary layer DNS with passive scalars,Near Wall Turbulence Flow,edited by R.M.So et al,Elsevier Science Publisher(1993),327-336.