Mathematics – Logic
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pggp.rept...69g&link_type=abstract
In NASA. Washington Repts. of Planetary Geol. Program p 69-70 (SEE N84-23431 13-91)
Mathematics
Logic
Environment Simulation, Venus Atmosphere, Venus Surface, Wind Effects, Wind Profiles, Wind Tunnel Tests, Atmospheric Circulation, Atmospheric Composition, Flux (Rate), Particle Size Distribution, Wind Erosion, Wind Velocity
Scientific paper
Many of the questions regarding aeolian processes on Venus and the subsequent implications for surface history involve understanding the physics of particle motion in the venusian environment. The surface environment of Venus is simulated as closely as practicable using the Venus Wind Tunnel and to determine threshold wind speeds, particle flux, particle velocities, and the characteristics of various aeolian bedforms. Despite the relatively low wind speeds on Venus, the flux of windblown material on Venus is potentially high. A high fraction of material is transported as surface creep by rolling, estimates yield rates up to 100 kg per cm lane width per year depending upon the availability of material and wind frequency, suggesting that the formation of lowland plains by aeolian processes and the burial of various landforms such as impact craters could occur on short geological time-scales. Wind tunnel simulations demonstrate that aeolian processes may be very effective in modifying the surface through erosion and deposited and may have an important influence on the composition of the atmosphere.
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