Aerosol and Clouds
Numerical simulation of saltating particles in atmospheric boundary layer over flat bed and sand ripples
Article first published online: 21 AUG 2012
©2012. American Geophysical Union. All Rights Reserved.
Journal of Geophysical Research: Atmospheres (1984–2012)
Volume 117, Issue D16, 27 August 2012
How to Cite
2012), Numerical simulation of saltating particles in atmospheric boundary layer over flat bed and sand ripples, J. Geophys. Res., 117, D16205, doi:10.1029/2011JD017424., and (
- Issue published online: 21 AUG 2012
- Article first published online: 21 AUG 2012
- Manuscript Accepted: 4 JUL 2012
- Manuscript Revised: 22 JUN 2012
- Manuscript Received: 1 JAN 2012
- sand particles;
- sand ripples
 In this work, we numerically simulated the saltating particles in a turbulent boundary layer over flat bed and sand ripples. By using natural sand grains in a wind tunnel, we obtained the initial conditions for the simulation and also verified the correctness of the numerical model. We carefully analyzed the numerically simulated saltating particle movement over the two sand beds, and we found the following. (1) The aeolian sand transport is a dynamic equilibrium process on both sand beds, and it took longer to reach equilibration on the sand ripples than on the flat bed. (2) According to the mass flux profile at the trough of the sand ripples, there is a maximum mass flux at about 4 cm height in the leeward section. The mass flux increases with height below 4 cm and decreases with height above 4 cm. (3) The wind profile near the surface is modified by saltating particles on the two different sand beds, and the flow field characteristics of the sand ripples are more complex than that of the flat bed.