Two‐point correlation model and the redistribution of Reynolds stresses
作者:
D. Naot,
A. Shavit,
M. Wolfshtein,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1973)
卷期:
Volume 16,
issue 6
页码: 738-743
ISSN:0031-9171
年代: 1973
DOI:10.1063/1.1694422
出版商: AIP
数据来源: AIP
摘要:
Aquasi‐isotropiclocally homogeneous model for the two‐point double‐velocity correlation tensor is developed by the application of a plausible set of symmetry restrictions to this tensor. The two‐point correlation is related to the single‐point correlation by three independent functions, and reduces to the nonisotropic single‐point correlation and the isotropic two‐point correlation in the limiting cases. It is shown that the model implies that by the use of three independent microscales (and macroscales) it is possible to describe a matrix of 27 elements of microscales (and macroscales) which describe the nonisotropic field. The model is also used to calculate the dissipation rate of the components of the Reynolds stresses. Finally, a formula which expresses the redistribution of the velocity fluctuations due to pressure fluctuations is developed.
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