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Variable-range projection model for turbulence-driven collisions

Gustavsson, K.; Mehlig, B.; Wilkinson, M. and Uski, V. (2008). Variable-range projection model for turbulence-driven collisions. Physical Review Letters, 101(17) p. 174503.

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We discuss the relative speeds ΔV of inertial particles suspended in a highly turbulent gas when the Stokes number, a dimensionless measure of their inertia, is large. We identify a mechanism giving rise to the distribution PV)~exp(-C|ΔV|4/3) (for some constant C). Our conclusions are supported by numerical simulations, and by the analytical solution of a model equation of motion. The results determine the rate of collisions between suspended particles. They are relevant to the hypothesized mechanism for formation of planets by aggregation of dust particles in circumstellar nebula.

Item Type: Journal Article
ISSN: 0031-9007
Academic Unit/Department: Mathematics, Computing and Technology > Mathematics and Statistics
Item ID: 17654
Depositing User: Colin Smith
Date Deposited: 09 Jul 2009 09:44
Last Modified: 02 Dec 2010 20:34
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