Non-universality of von Kérmén's κ in fluvial streams

Gaudio, Roberto ; Miglio, Antonio ; Dey, Subhasish (2010) Non-universality of von Kérmén's κ in fluvial streams Journal of Hydraulic Research, 48 (5). pp. 658-663. ISSN 0022-1686

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A distinguished universal aspect of wall-bounded turbulent flows is Theodore von Kérmén's universal logarithmic law (log-law) of the wall, describing the time-averaged streamwise velocity variation with distance from the wall. The log-law has a universal von Kérmén constant κ governing the velocity gradient. There remain a number of cases of the non-universality of κ in fluvial streams. In particular, it behaves as a variable in flows with low submergence, or if there is bed- and suspended-load transport. This research focuses on the non-universality of κ raising various issues and inviting future research directions.

Item Type:Article
Source:Copyright of this article belongs to International Association of Hydraulic Engineering and Research.
Keywords:Hydraulics; One-dimensional Flow; Review; Sediment Bed; Stream Flow; von Kérmén Constant
ID Code:78816
Deposited On:23 Jan 2012 04:03
Last Modified:23 Jan 2012 04:03

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