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

Donatella Termini

doi:10.1515/heem-2015-0021

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

Archives of Hydro-Engineering and Environmental Mechanics

Volume 62 (2015): Issue 3-4 (December 2015)

By: Donatella Termini

Open Access

|Mar 2016

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.

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Articles in this issue

DOI: https://doi.org/10.1515/heem-2015-0021 | Journal eISSN: 2300-8687 | Journal ISSN: 1231-3726

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Language: English

Page range: 77 - 99

Submitted on: Jul 15, 2015

Published on: Mar 17, 2016

Published by: Polish Academy of Sciences, Institute of Hydro-Engineering

In partnership with: Paradigm Publishing Services

Publication frequency: 2 issues per year

Keywords:

open-channel flow,

flow turbulence structure,

burst cycle,

bed forms,

laboratory experiments

Related subjects:

Engineering,

Introductions and overviews,

Engineering, other

© 2016 Donatella Termini, published by Polish Academy of Sciences, Institute of Hydro-Engineering
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Volume 62 (2015): Issue 3-4 (December 2015)