On the collision rate of particles in turbulent flow with gravity

Z. Dodin; T. Elperin

doi:10.1063/1.1490136

On the collision rate of particles in turbulent flow with gravity

Z. Dodin, T. Elperin

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Formula for the collision rate of inertial particles in a homogeneous isotropic stationary turbulent flow with gravity is derived. The obtained formula yields correct results for two special cases, where the formula by Saffman and Turner [J. Fluid Mech. 1, 16 (1956)] fails. In the case of the particles with the same size, the collision rate predicted by Saffman and Turner is 29% higher than that predicted by the obtained formula. Turbulence effects on the collision rate are estimated for the conditions pertinent to droplets in atmospheric clouds.

Original language	English
Pages (from-to)	2921-2924
Number of pages	4
Journal	Physics of Fluids
Volume	14
Issue number	8
DOIs	https://doi.org/10.1063/1.1490136
State	Published - 1 Jan 2002

ASJC Scopus subject areas

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1063/1.1490136

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On the collision rate of particles in turbulent flow with gravity

Abstract

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