KOSI - Gas drag derived from ice/dust-particle trajectories

Details KOSI - Gas drag derived from ice/dust-particle trajectories KOSI - Gas drag derived from ice/dust-particle trajectories

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..273k&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Feb. 1991, p. 273-276.

Physics

14

Cometary Atmospheres, Ice, Interplanetary Dust, Particle Trajectories, Space Simulators, Comet Nuclei, Comet Tails, Ground Tests

Scientific paper

Observations of the gas interaction with the grains emitted during the comet simulation experiments (KOSI) are presented. Trajectories of the emitted ice/dust particles were monitored by a high speed video camera at the time of the large-scale experiment KOSI-5 in November, 1989 in the DLR Space Simulator. It is found that the particles are coupled rather than deposited loosely on the surface and it appears that the particle dynamics is dominated by the acceleration during their flight. This acceleration is created by the momentum transfer from the gas sublimating from the sample. Thus the ice/dust particles seem to be entrained into the gas flow, rather than ejected from the surface.

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