Height profile of particle concentration in an aeolian saltating cloud: A wind tunnel investigation by PIV MSD

Details Height profile of particle concentration in an aeolian saltating cloud: A wind tunnel investigation by PIV MSD Height profile of particle concentration in an aeolian saltating cloud: A wind tunnel investigation by PIV MSD

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30ssd12d&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 19, pp. SDE 12-1, CiteID 2004, DOI 10.1029/2003GL017915

Physics

1

Geodesy And Gravity: Ocean/Earth/Atmosphere Interactions (3339), Meteorology And Atmospheric Dynamics: Land/Atmosphere Interactions, Meteorology And Atmospheric Dynamics: Boundary Layer Processes, Planetary Sciences: Erosion And Weathering

Scientific paper

Attempt is made to define the particle concentration in an aeolian saltating cloud and its variation with height using artificial spherical quartz sand in a wind tunnel. The height profiles of the relative particle concentration in aeolian saltating cloud at three wind velocities were detected by the state of the art PIV (Particle Image Velocimetry) MSD (Mie Scattering Diffusion) technique, and converted to actual concentration based on sand transport rate and the variation with height of velocity of the saltating cloud. The particle concentration was found to decay exponentially with height and to increase with wind velocity. It decayed more rapidly when the wind velocity decreased. The volume/volume concentration in the near-surface layer was at the order of 10-4. The results obtained by PIV MSD technique were in good agreement with those derived from the sand flux and velocity profiles, the former being about 15% greater than the later.

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