The effect of vertical distortion in the modeling of sedimentation phenomena - Martian crater wake streaks

Details The effect of vertical distortion in the modeling of sedimentation phenomena - Martian crater wake streaks The effect of vertical distortion in the modeling of sedimentation phenomena - Martian crater wake streaks

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.4846i&link_type=abstract

Journal of Geophysical Research, vol. 81, Sept. 10, 1976, p. 4846-4856. Research supported by the Iowa State University of Scie

Astronomy and Astrophysics

Astronomy

6

Craters, Mars Surface, Terradynamics, Wind Tunnel Models, Astronomical Models, Equations Of Motion, Granular Materials, Mars Photographs, Mass Flow Rate, Particle Trajectories, Similitude Law, Soil Erosion, Time Dependence, Turbulent Boundary Layer, Turbulent Wakes, Vertical Distribution

Scientific paper

Theoretical mass flow rate and the particle trajectory equations of motion of granular material in saltation are used to correlate experimental data for the rate of erosion in the wake regions of wind-tunnel-model Martian craters. Vertical geometric distortion is inherent in the simulation because of the equivalent roughness height characteristic of a turbulent boundary layer, which is affected by material in saltation. It is thus necessary to distort topographic model geometry in the vertical direction. A systematic similitude which is based on erosion rate and equivalent roughness in saltation is shown to correlate time-dependent model data as long as the model Reynolds number is higher than a critical value.

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