An Analytical Expression for Wind-Velocity Profile Within the Saltation Layer
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.
Z. S. Li et al., "An Analytical Expression for Wind-Velocity Profile Within the Saltation Layer," Geomorphology, Elsevier, Jun 2004.
The definitive version is available at http://dx.doi.org/10.1016/j.geomorph.2003.08.008
Civil, Architectural and Environmental Engineering
National Natural Science Foundation (China)
Keywords and Phrases
Analytic Expression; Saltation Layer; Shear Stress Profile; Wind-Velocity Profile
Article - Journal
© 2004 Elsevier, All rights reserved.