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(Article of periodic en Anglais - 2006)

Document title

Representing the bed roughness of coarse-grained streams in computational fluid dynamics

Authors(s) and Affiliation(s)

CARNEY S.K. ; BLEDSOE B.P. ; GESSLER D. ;

Abstract

Adequately characterizing the effects of gravel and cobble beds on flow hydraulics in computational fluid dynamics (CFD) is a difficult challenge due to the scale of roughness lengths and the inadequacy of traditional roughness representations to characterize flow profiles in situations with large roughness elements. An alternative method of representing gravel and cobble beds is presented. Appropriate drag forces associated with different grain sizes are computed and included in the momentum equations to account for the influence of a hydraulically rough bed. Comparisons with field measurements reveal reasonable agreement between measured and modelled profiles of spatially averaged velocity and turbulent kinetic energy

Source

Article of periodic

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

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

Millesime : 2006, vol. 31, no6 [pp. 736-749]

Bibliographic references : 38 ref.

Collation : Illustration ;

Language

Anglais

Localisation

Laboratoire INTERGEO - Paris

INIST-CNRS, Cote INIST : 17355

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2006.
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