EAS Publications Series
Volume 35, 2009Interstellar Dust from Astronomical Observations to Fundamental Studies
|Page(s)||195 - 217|
|Published online||26 February 2009|
F. Boulanger, C. Joblin, A. Jones and S. Madden (eds)
EAS Publications Series, 35 (2009) 195-217
Institut für Geophysik und extraterrestrische Physik, Technische Universität zu
Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, Germany
Corresponding author: email@example.com
This article is intended to be used as an introduction to the problem of protoplanetary dust aggregation. The basic concept of dust aggregation and its description by Smoluchowski's equation are presented. Analytic solutions to Smoluchowski's equation are explored which show some characteristics of the more general solutions, such as self-similarity and scaling behavior. The physics of dust aggregation is treated through interaction forces between the particles and empirical data on sticking efficiencies and particle morphologies in dust-dust collisions. Aggregate morphologies are described by the fractal concept, and its implications for collision cross sections and collision velocities are discussed. Theoretical and experimental work on collision-induced restructuring and fragmentation of fractal and non-fractal dust aggregates is presented. Finally, the latest modelling approaches for protoplanetary dust growth are discussed.
© EAS, EDP Sciences, 2009
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