Wind-flow over seif dune models - Implications for Mars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Mars Surface, Astronomical Models, Mariner 9 Space Probe, Dunes, Sands, Wind Effects, Satellite Imagery, Viking Orbiter Spacecraft, Stress Measurement

Scientific paper

A novel technique enabling measurement of surface stress on simulated Martian seif dunes possible. Preliminary results are presented for simulated Martian dunes on the order of 1 m high. Lee-side reattachment is Reynolds-number-dependent. It is suggested that for low Reynolds number flow, the mechanisms required for seif dune formation are present on Mars, but the scale of Martian seif dunes would have be on the order of 12 times smaller. If the scale or Reynolds number were any greater, the mechanisms for dune formation and sand particle flux would only allow for simple dune types.

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