Coagulation of protoplanetary dust

Details Coagulation of protoplanetary dust Coagulation of protoplanetary dust

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990esasp.315...87b&link_type=abstract

In ESA, Formation of Stars and Planets, and the Evolution of the Solar System p 87-92 (SEE N91-18922 10-90)

Physics

2

Agglomeration, Coagulation, Cosmic Dust, Planetary Evolution, Protoplanets, Accretion Disks, Aggregates, Collision Parameters, Particle Interactions

Scientific paper

An experimental setup developed to investigate collisional processes between protoplanetary dust particles is described. The experiments are carried out with fluffy agglomerates in the velocity region from 0.27 to 3.3 m/s. The experimental results show that three different issues can be distinguished; these are coagulation, restitution, and fragmentation. To better understand the physics of low velocity collisions of fluffy agglomerates, a theoretical model is developed taking into consideration the high deformability of the agglomerates, as well as attractive van der Waals forces between colliding particles. Extrapolation of the model allows predictions of the collisional behavior of icy or stony agglomerates to be made.

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