Physics – Geophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..282l&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 282-284 (SEE N87-23341 16-91)
Physics
Geophysics
Hemispheres, Reynolds Number, Shear Stress, Wind Effects, Wind Shear, Sands, Vortices, Wind Velocity
Scientific paper
Obstacles projecting into the wind stream alter the shear stress on the surface around them, thus altering the erosion, transportation, and deposition of aeolian sediment. The effect of Reynolds number on the pattern of shear stress on the surface around an isolated hemisphere was investigated. An understanding of Reynolds number effects is necessary if wind tunnel results are to be scaled up to natural situations for meaningful applications. The experiment shows that the surface shear stress pattern is strongly affected by Reynolds number, at least within the range of Re used (1360 to 2977). This is presumably due to a decrease in flow around the sides of the hemisphere and an increase in flow over the object as the Reynolds number increases.
Greeley Ronald
Lee Jeong Ae
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