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Grid turbulence near a moving wall

Published online by Cambridge University Press:  12 April 2006

N. H. Thomas  and
P. E. Hancock
N. H. Thomas
Affiliation:
Department of Aeronautics, Imperial College, London Present address: Department of Applied Mathematics and Theoretical Physics, University of Cambridge.
P. E. Hancock
Affiliation:
Department of Aeronautics, Imperial College, London
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Abstract

Decaying grid turbulence was passed over a wall moving at the stream speed. For the high Reynolds number of the experiment, the field due to the wall constraint on the normal component of the velocity fluctuations is found to extend further into the flow than the influence of the viscous boundary condition on the tangential-component fluctuations. Measurements of the variances, length scales and spectra of the three velocity components of the turbulence are compared with the results of a previous experiment and with the theoretical predictions for an idealization of the flow. A simple model for some departures from the theory is proposed.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 82 , Issue 3 , 27 September 1977 , pp. 481 - 496
Copyright
© 1977 Cambridge University Press

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