Laboratory experiments in a straight flume were carried out to examine the evolution of large-scale horizontal turbulent structures under flat-bed and deformed-bed conditions. In this paper, the horizontal turbulence of flow under these conditions is analyzed and compared. The conditioned quadrant method is applied to verify the occurrence of turbulent events. The distributions of horizontal Reynolds shear stress and turbulent kinetic energy are also presented and discussed. Results show the occurrence of an "initial" sequence of horizontal vortices whose average spatial length scales with the channel width. Under deformed-bed conditions, this spatial length does not change.

Termini, D. (2015). Experimental analysis of horizontal turbulence of flow over flat and deformed beds. ARCHIVES OF HYDROENGINEERING AND ENVIRONMENTAL MECHANICS, 63(3-4), 77-99 [10.1515/heem-2015-0021].

Experimental analysis of horizontal turbulence of flow over flat and deformed beds

TERMINI, Donatella
2015

Abstract

Laboratory experiments in a straight flume were carried out to examine the evolution of large-scale horizontal turbulent structures under flat-bed and deformed-bed conditions. In this paper, the horizontal turbulence of flow under these conditions is analyzed and compared. The conditioned quadrant method is applied to verify the occurrence of turbulent events. The distributions of horizontal Reynolds shear stress and turbulent kinetic energy are also presented and discussed. Results show the occurrence of an "initial" sequence of horizontal vortices whose average spatial length scales with the channel width. Under deformed-bed conditions, this spatial length does not change.
http://www.degruyter.com/view/j/heem
Termini, D. (2015). Experimental analysis of horizontal turbulence of flow over flat and deformed beds. ARCHIVES OF HYDROENGINEERING AND ENVIRONMENTAL MECHANICS, 63(3-4), 77-99 [10.1515/heem-2015-0021].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/207901
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