Peculiar mean velocity profiles within a porous bed of an open channel

D. Pokrajac; C. Manes; I. McEwan

doi:10.1063/1.2780193

Peculiar mean velocity profiles within a porous bed of an open channel

D. Pokrajac, C. Manes, I. McEwan

Engineering

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26 Citations (Scopus)

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Abstract

We present the velocity profile measured within a porous bed below rough turbulent open channel flow. Mean streamwise velocity has a minimum in the top pore, just below the bed surface, and then increases towards a constant value in the deeper pores. We argue that the velocity minimum in the top pore is due to enhanced turbulence generated within the external flow. This produces a flow regime similar to rough turbulent pipe flow, with very efficient momentum extraction. In the deeper pores turbulence intensities are damped so that momentum extraction is less efficient, allowing higher mean velocities to develop. (c) 2007 American Institute of Physics.

Original language	English
Article number	098109
Number of pages	4
Journal	Physics of Fluids
Volume	19
Issue number	9
DOIs	https://doi.org/10.1063/1.2780193
Publication status	Published - Sep 2007

Keywords

boundary-conditions
homogeneous fluid
momentum-transfer
flow
interface
media
surface
water

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10.1063/1.2780193

Pokrajac Manes McEwan PhysFluids 2007
Copyright 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article has been submitted to/accepted by Physics of Fluids. After it is published, it will be found at http://pof.aip.org/
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Cite this

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KW - homogeneous fluid

KW - momentum-transfer

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KW - interface

KW - media

KW - surface

KW - water

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Peculiar mean velocity profiles within a porous bed of an open channel

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Keywords

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