Research Article
Sep 1969
Dispersivity Tensor for Turbulent Uniform Channel Flow
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VIEW THE REPLYAuthor: Gedeon DaganAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 95, Issue 5
Abstract
The turbulent mixing of a solute in a stream flow is described with the aid of the dispersivity tensor. In a two-dimensional pipe or wide channel flow only the radial, or vertical, dispersivity coefficient is significant and is usually determined through the Reynolds analogy. The analogy is extended to a three-dimensional (i.e., channel of arbitrary section) uniform flow. It is shown that the mixing length theory leads to the representation of the dispersivity tensor in the terms of only two distinct coefficients: (1) A coefficient representing mixing normal to isovels which may be found through Reynolds analogy; and (2) a lateral dispersivity coefficient which has to be determined from dispersivity measurements.
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Published In
Journal of the Hydraulics Division
Volume 95 • Issue 5 • September 1969
Pages: 1699 - 1712
Copyright
© 1969 American Society of Civil Engineers.
History
Published in print: Sep 1969
Published online: Feb 3, 2021
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Gedeon Dagan
Hydronautics, Inc., Laurel, Md; on leave from Technoin, Israel Inst. of Tech., Haifa, Israel
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