A Mechanism for the Excitation of Coherent Structures in the Wall Region of a Turbulent Boundary Layer

ZHANG Dong-ming; LUO Ji-sheng; ZHOU Heng

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Article Navigation > Applied Mathematics and Mechanics > 2005 > 26(4): 379-385

ZHANG Dong-ming, LUO Ji-sheng, ZHOU Heng. A Mechanism for the Excitation of Coherent Structures in the Wall Region of a Turbulent Boundary Layer[J]. Applied Mathematics and Mechanics, 2005, 26(4): 379-385.

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A Mechanism for the Excitation of Coherent Structures in the Wall Region of a Turbulent Boundary Layer

Department of Mechanics, Tianjin University, Tianjin 300072, P. R. China

Received Date: 2003-09-26
Rev Recd Date: 2004-11-30
Publish Date: 2005-04-15

Abstract

Abstract

The problem of how the coherent structures in the wall region of a turbulent boundary layer could be excited by the disturbances from the outer region was investigated by using direct numerical simulation(DNS)method.The results show that velocity disturbances at the upper boundary of the wall region could excite coherent structures in the wall region,thus offering a more comprehensive model for individual coherent structures.
- turbulent boundary layer,
- coherent structures,
- excitation

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References(5)

References

[1]	Tsujimoto K,Miyake Y.Universal property of autonomous layer in nearwall turbulence[A].In:Kambe T,Miyake Y Eds.IUTAM Symposium on Geometry and Statistics of Turbulence[C].the Netherlands:Kluwer Academic Publishers,1999，385—390.
[2]	周恒，陆昌根，罗纪生.湍流边界层近壁区单个相干结构的模拟[J].中国科学，A辑，1999，29(4):366—372.
[3]	周恒，熊忠民.湍流边界层近壁区相干结构起因的研究[J].中国科学,A辑，1994，24（9）：941—948.
[4]	Gurzennec Y G, Piomelli U, Kim J. On the shape and dynamics of wall structures in turbulent channel flow[J].Phy Fluids A,1989,1(4):764—766. doi: 10.1063/1.857373
[5]	Hinze J O.Turbulence[M].2nd edition.New York:McGraw-Hill Book Company,1975,488.