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A note on a generalized eddy-viscosity hypothesis
Luleå tekniska universitet.
Luleå tekniska universitet.
1992 (English)In: Journal of Fluids Engineering - Trancactions of The ASME, ISSN 0098-2202, E-ISSN 1528-901X, Vol. 114, no 3, p. 463-466Article in journal (Refereed) Published
Abstract [en]

The standard eddy-viscosity concept postulates that zero velocity gradient is accompanied by zero shear stress. This is not true for many boundary layer flows: wall jets, asymmetric channel flows, countercurrent flows, for example. The generalized eddy-viscosity hypothesis presented in this paper, relaxes this limitation by recognizing the influence of gradients in the turbulent length scale and the shear. With this new eddy-viscosity concept, implemented into the standard k - ε model, predictions of some boundary layer flows are made. The modelling results agree well with measurements, where predictions with the standard eddy-viscosity concept are known to fail.

Place, publisher, year, edition, pages
1992. Vol. 114, no 3, p. 463-466
National Category
Water Engineering
Research subject
Water Resources Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-9156DOI: 10.1115/1.2910055ISI: A1992JQ40500029Scopus ID: 2-s2.0-0026927742Local ID: 7b8cfb40-0a19-11dd-ae49-000ea68e967bOAI: oai:DiVA.org:ltu-9156DiVA, id: diva2:982094
Note
Godkänd; 1992; 20080414 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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