Take-off threshold velocity of saltating particles under heat radiation

Take-off threshold velocity of saltating particles under heat radiation A wind tunnel and a heating device were designed in order to study the influence of solar radiation on the wind-induced motion of solid particles. Velocity and temperature measurements in the boundary layer exhibited clear modifications of flow characteristics with a surprising balance between the viscosity increase and the reduction in the wall velocity gradient. This induces a constant critical wall shear stress under heat flux. Measurements of threshold velocity undertaken to elucidate the possible effects of solar radiation through the increase in turbulence intensity showed a reduction in critical free-stream velocity as the free-stream turbulence increased. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Take-off threshold velocity of saltating particles under heat radiation

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Publisher
Springer-Verlag
Copyright
Copyright © 2002 by Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-002-0426-7
Publisher site
See Article on Publisher Site

Abstract

A wind tunnel and a heating device were designed in order to study the influence of solar radiation on the wind-induced motion of solid particles. Velocity and temperature measurements in the boundary layer exhibited clear modifications of flow characteristics with a surprising balance between the viscosity increase and the reduction in the wall velocity gradient. This induces a constant critical wall shear stress under heat flux. Measurements of threshold velocity undertaken to elucidate the possible effects of solar radiation through the increase in turbulence intensity showed a reduction in critical free-stream velocity as the free-stream turbulence increased.

Journal

Experiments in FluidsSpringer Journals

Published: Aug 8, 2002

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