Experimental Study of Measurement for Dissipation Rate Scaling Exponent in Heated Wall Turbulence

JIANG Nan; WANG Yu-chun; SHU Wei; WANG Zhen-dong

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Article Navigation > Applied Mathematics and Mechanics > 2002 > 23(9): 921-928

JIANG Nan, WANG Yu-chun, SHU Wei, WANG Zhen-dong. Experimental Study of Measurement for Dissipation Rate Scaling Exponent in Heated Wall Turbulence[J]. Applied Mathematics and Mechanics, 2002, 23(9): 921-928.

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Experimental Study of Measurement for Dissipation Rate Scaling Exponent in Heated Wall Turbulence

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

Received Date: 2001-08-17
Rev Recd Date: 2002-04-28
Publish Date: 2002-09-15

Abstract

Abstract

Experimental investigations were devoted to the study of scaling exponent of coarse grained dissipation rate structure function for velocity and temperature fluctuation in a turbulent boundary layer at moderate Reynolds number. Longitudinal velocity and temperature were measured at different vertical positions in turbulent boundary layer over a heated and unheated flat plate in a wind tunnel using hot wire anemometer. The effect of non-isotropy and inhomogeneity on scaling exponent of dissipation rate was studied because of the existence of organized coherent structure burst process in the near wall region. The scaling law of coarse-grained dissipation rate structure function is found to be independent of the mean velocity shear strain and the heating wall boundary condition. The scaling exponent of the dissipation rate structure function is verified to be in agreement with the hierarchical structure model which has been valid for isotropic and homogeneous turbulence.
- heating,
- wall turbulence,
- dissipation rate,
- scaling exponent,
- hierarchical structure model

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References(10)

References

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