Windblown sand on Venus - Preliminary results of laboratory simulations

Details Windblown sand on Venus - Preliminary results of laboratory simulations Windblown sand on Venus - Preliminary results of laboratory simulations

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984icar...57..112g&link_type=abstract

Icarus (ISSN 0019-1035), vol. 57, Jan. 1984, p. 112-124. NASA-supported research.

Mathematics

Logic

32

Ground Wind, Particle Motion, Sands, Venus (Planet), Wind Effects, Wind Tunnel Tests, Aerodynamic Drag, Atmospheric Models, Reynolds Number, Sediment Transport, Wind Tunnel Calibration, Wind Velocity, Venus, Winds, Sand, Experiments, Simulations, Pioneer Missions, Venera Missions, Aeolian Processes, Particles, Saltation, Velocity, Size, Theoretical Studies, Models, Comparisons, Geology, Evolution

Scientific paper

Small particles and winds of sufficient strength to move them have been detected from Venera and Pioneer-Venus data and suggest the existence of aeolian processes on Venus. The Venus wind tunnel (VWT) was fabricated in order to investigate the behavior of windblown particles in a simulated Venusian environment. Preliminary results show that sand-size material is readily entrained at the wind speeds detected on Venus and that saltating grains achieve velocities closely matching those of the wind. Measurements of saltation threshold and particle flux for various particle sizes have been compared with theoretical models which were developed by extrapolation of findings from Martian and terrestrial simulations. Results are in general agreement with theory, although certain discrepancies are apparent which may be attributed to experimental and/or theoretical-modeling procedures. Present findings enable a better understanding of Venusian surface processes and suggest that aeolian processes are important in the geological evolution of Venus.

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