Dust transport in a wind tunnel under Martian conditions

Details Dust transport in a wind tunnel under Martian conditions Dust transport in a wind tunnel under Martian conditions

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....8599g&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #8599

Computer Science

Scientific paper

Processes in the weathering crust, the origin and the reactions of the iron oxide dust covering the surface of the planet Mars is the focus of an interdisciplinary group of scientists working on Martian surface conditions. A wind tunnel which can operate under Martian conditions and a few smaller simulation chambers have been constructed for testing hypotheses related to Martian surface processes. Aerodynamics at Martian pressure, which implies operating with a thicker boundary layer, causes a behaviour of the dust particles in atmospheric transport which can not be reliably tested under terrestrial pressure conditions. Experiments show that e.g. slightly magnetic dust grains are captured by weak magnets at low wind velocities on Mars, but not on Earth. This is one example of why tests of Martian surface instruments should as far as possible be carried out under Martian conditions. Tests of hardware for the ESA, Mars Express (Beagle2) and for the NASA Athena missions were carried out during 2002. Backscattering Mössbauer analyses of dust particles captured by the Athena magnets show that magnetically captured dust can give important information compared to the dust deposited on a non magnetic surface.

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