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The effects of slope and slope position on local and upstream fluid threshold friction velocities

ICAR 6 : Aeolian processes. Special issue

Auteur(s) et Affiliation(s)

HUANG, N.
Key Laboratory of Mechanics on Western Disaster and Environment. The Ministry of Education and Dept. of Mechanics, Univ., Lanzhou, Chine
SHI, F.
Key Laboratory of Mechanics on Western Disaster and Environment. The Ministry of Education and Dept. of Mechanics, Univ., Lanzhou, Chine
VAN PELT, R.S.
USDA-ARS-Wind Erosion and Water Conservation Research Unit, Texas, Big Spring, Etats-Unis
SHAO, Y.
Inst. for Geophysics and Meteorology, Univ., Köln, Allemagne
KOHFELD, K.E.
School of Resource and Environmental Management, Simon Fraser Univ., Burnaby, Canada


Description :
A computational fluid dynamics (CFD) model is used to simulate a stable wind blowing over slope beds of varying height and coupled with the slope-compensating fluid threshold friction velocity formula. Based on the CFD-based model, quantitative analyses of slope gradient and particle position on the initiation of particle movement are performed. Results indicate that the slope has a great influence on particle saltation in the windward slope, and the initiation of particle movement is particularly sensitive to particle position with respect to the slope.


Type de document :
Congrès

Source :
Internat. Conf. on Aeolian Research (ICAR 6), 6, Guelph, Canada, 2006-07-24/2006-07-26, Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 12, p. 1814-1823, nombre de pages : 10, Références bibliographiques : 1 p.

Date :
2008

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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