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(Article of periodic en Anglais - 2012)

Document title

Mean and turbulent flow fields in a simulated ice-covered channel with a gravel-bed : some laboratory observations

Authors(s) and Affiliation(s)

ROBERT A. (1) ; TRAN T. (1) ;
(1) Dep. of Geography, York Univ., Toronto, CANADA

Abstract

In this study, flume experiments of flows under a simulated ice cover are presented. Open water conditions and simulated rough ice-covered flows are discussed. Mean flow and turbulent flow statistics were obtained from an Acoustic Doppler Velocimeter (ADV) above a gravel-bed surface. A central region of faster flow develops in the middle portion of the flow with the addition of a rough cover. The turbulent flow characteristics are unambiguously different when simulated ice covered conditions are used. Two distinct boundary layers (near the bed and in the vicinity of the ice cover, near the water surface) are clearly identified, each being characterized by high turbulent intensity levels. Detailed profile measurements of Reynolds stresses and turbulent kinetic energy indicate that the turbulence structure is strongly influenced by the presence of an ice cover and its roughness characteristics

Source

Article of periodic

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

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

Millesime : 2012, vol. 37, no9 [pp. 951-956]

Bibliographic references : 23 ref.

Collation : 8 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3211

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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