An Analytical Expression for Wind-Velocity Profile Within the Saltation Layer

Abstract

The vertical wind-velocity profile within the saltation layer is investigated theoretically. New equations for the fluid shear stress distribution in the saltation layer and the velocity profile affected by saltation are derived. The dependence of the velocity profile on the threshold shear velocity, the vertical variations of sand grain velocity, the vertical sand-mass-flux distribution, and the fluid shear stress within the saltation are demonstrated. Velocity profiles with or without Bagnold's focus are predicted. These velocity profiles are not very sensitive to the vertical distribution of sand-mass flux. Predicted velocity profiles are compared with profiles measured in the wind tunnel, and satisfactory agreement has been achieved.

Department(s)

Civil, Architectural and Environmental Engineering

Sponsor(s)

National Natural Science Foundation (China)

Keywords and Phrases

Analytic Expression; Saltation Layer; Shear Stress Profile; Wind-Velocity Profile

International Standard Serial Number (ISSN)

0169-555X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2004 Elsevier, All rights reserved.

Publication Date

01 Jun 2004

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