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(Article of periodic en Anglais - 2011)

Document title

Experimental analysis of cross-sectional flow motion in a large amplitude meandering bend

Authors(s) and Affiliation(s)

TERMINI D. (1) ; PIRAINO M. (1) ;
(1) Dipartimento di Ingegneria Idraulica ed Applicazioni Ambientali, Univ., Palermo, ITALIE

Abstract

Experiments have been carried out in a laboratory meandering channel of large amplitude, over a deformed-rigid bed, for 2 values of the width-to-depth ratio. The three-dimensional flow velocity field has been measured in detail at 5 cross-sections, almost equally spaced along the channel reach between 2 consecutive apex sections. The measurements have been carried out on a fine grid by an acoustic Doppler velocity profiler. The distributions of the cross-sectional flow and turbulent kinetic energy are analyzed in each investigated section. Measurements show that the counter-rotating circulation cell is evident only in the case of ‘small’ width-to-depth ratio. Such circulation cell begins at the bend entrance and it is fully developed at the bend apex; then it decays. Moreover, the presence of the counter-rotating circulation cell allows the bank shear stress to maintain low values in the outer-side of the bend

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2011, vol. 36, no2 [pp. 244-256]

Bibliographic references : 66 ref.

Collation : 10 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2095

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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