Aggregation in Particulate Clouds in Astrophysical and Planetary Settings: Preliminary Results from USML-2

Details Aggregation in Particulate Clouds in Astrophysical and Planetary Settings: Preliminary Results from USML-2 Aggregation in Particulate Clouds in Astrophysical and Planetary Settings: Preliminary Results from USML-2

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..811m&link_type=abstract

Lunar and Planetary Science, volume 27, page 811

Biology

2

Aggregation, Clouds, Electrostatics, Microgravity, Particles

Scientific paper

Particle aggregation experiments were conducted in the 2nd U.S. Microgravity Laboratory (USML-2) to determine how particulate materials aggregate in response to cloud density, dielectric properties of the grains, and grain shape. Results confirm earlier findings from USML-1 that aggregation in particulate clouds is predominantly controlled by long-range electrostatic forces. They also confirm the universal occurrence of filamental aggregates, structures that implicate dipoles as the primary coulombic force leading to aggregation. USML-2 experiments led to the discovery of this filamental aggregation in metallic particles where dipole interactions would seem to be ruled out. The work is supported by NASA's Exobiology Program.

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