Note on secondary flows in oscillating‐grid, mixing‐box experiments
作者:
H. J. S. Fernando,
I. P. D. De Silva,
期刊:
Physics of Fluids A
(AIP Available online 1993)
卷期:
Volume 5,
issue 7
页码: 1849-1851
ISSN:0899-8213
年代: 1993
DOI:10.1063/1.858808
出版商: AIP
数据来源: AIP
摘要:
Oscillating‐grid induced turbulence in confined geometries (tanks) is commonly used in the study of turbulence with zero‐mean shear. It is demonstrated that the mean secondary circulation generated during such experiments can be reduced by selecting conditions that lessen the Reynolds‐stress gradients within the fluid. A simple power law for the spatial decay of turbulent velocity fluctuations is realized only in the absence of such mean circulation.
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