The Effect of Temperature Gradient on the Correlation of Temperature Fluctuations

Ma Bai-kun

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Article Navigation > Applied Mathematics and Mechanics > 1986 > 7(5): 451-456

Ma Bai-kun. The Effect of Temperature Gradient on the Correlation of Temperature Fluctuations[J]. Applied Mathematics and Mechanics, 1986, 7(5): 451-456.

Citation:

Ma Bai-kun. The Effect of Temperature Gradient on the Correlation of Temperature Fluctuations[J]. Applied Mathematics and Mechanics, 1986, 7(5): 451-456.

Citation:

Ma Bai-kun. The Effect of Temperature Gradient on the Correlation of Temperature Fluctuations[J]. Applied Mathematics and Mechanics, 1986, 7(5): 451-456.

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The Effect of Temperature Gradient on the Correlation of Temperature Fluctuations

Ma Bai-kun

Department of Modern Mechanics, University of Science and Technology of China, Hefei

Received Date: 1985-02-11
Publish Date: 1986-05-15

Abstract

Abstract

In this paper we present the experintent results of the space corrclations of temperature fluctuations when there is and is not temperature gradient.From those results we can see clearly that the temperature fluctuation field is isotropic without temperature gradint,and it is obviously anisotropic with temperature gradient.The temperature correlation along the gradient direction β is obviously larger than the vertical to β direction. Our experiment results agree with the theory results of D. W. Dunn and W. H. Reid^[1].

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References(4)

References

[1]	Dunn,D,W.andw.H.R eid.Heat transfer in isotropic turbulence during the final period of decay,NACA TN-4186(1958).
[2]	La Rue.,John C,and R.,A.Libby,Thermul mixing layer downstream of half-heated turbulent grid,Phys,Fluids,24,4(1981)597 603.
[3]	Sirivat,A.and L,Warhaft,The effect of a passive cross-stream temperature gradiem on the evolution of temperature variance and heat flux in grid turbulence,J.Fluid Mech.,128(1983)323-346,
[4]	Warhaft,Z.,An experiment study of cffcet of uniform otrain on therrnal fluctuation in grid-generated turbulence,J,Fluit Mech.,99,3(1980)545-573.