<abstract xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></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.

Experimental Analysis of Horizontal Turbulence of Flow over Flat and Deformed Beds

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This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Laboratory experiments in a straight flume were carried out to examine the evolution of large-scale horizontal turbulent structures under flat-bed and...

Experimental Analysis of Horizontal Turbulence of Flow over Flat and Deformed Beds

Published Online: Mar 17, 2016

Page range: 77 - 99

Received: Jul 15, 2015

DOI: https://doi.org/10.1515/heem-2015-0021

Keywords
open-channel flow, flow turbulence structure, burst cycle, bed forms, laboratory experiments

© 2014 Donatella Termini, published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Experimental Analysis of Horizontal Turbulence of Flow over Flat and Deformed Beds

Published Online: Mar 17, 2016

Page range: 77 - 99

Received: Jul 15, 2015

DOI: https://doi.org/10.1515/heem-2015-0021

Keywordsopen-channel flow, flow turbulence structure, burst cycle, bed forms, laboratory experiments

© 2014 Donatella Termini, published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
open-channel flow, flow turbulence structure, burst cycle, bed forms, laboratory experiments