Threshold windspeeds for sand on Mars - Wind tunnel simulations

Details Threshold windspeeds for sand on Mars - Wind tunnel simulations Threshold windspeeds for sand on Mars - Wind tunnel simulations

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..121g&link_type=abstract

Geophysical Research Letters, vol. 7, Feb. 1980, p. 121-124. NASA-supported research.

Physics

68

Environment Simulation, Mars Surface, Particle Motion, Sands, Wind Tunnel Tests, Wind Velocity, Air Land Interactions, Data Reduction, Friction, Mars Atmosphere, Thresholds, Mars, Friction, Wind Velocity, Simulations, Particles, Surface, Pressure, Atmosphere, Reynolds Numbers, Saltation, Experiments, Procedure, Data Reduction, Grain Size, Temperatures, Erosion, Dynamics, Viscosity, Turbulence, Boundary Layers, Analysis, Viking Landers, Landing Sites, Data

Scientific paper

Wind friction threshold speeds for particle movement were determined in a wind tunnel operating at martian surface pressure with a 95 percent CO2 and 5 percent air atmosphere. The relationship between friction speed and free-stream velocity is extended to the critical case for Mars of momentum thickness Reynolds numbers between 425 and 2000. It is determined that the dynamic pressure required to initiate saltation is nearly constant for pressures between 1 bar and 4 mb for atmospheres of both air and CO2.

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