The Open UniversitySkip to content
 

Prevalence of the sling effect for enhancing collision rates in turbulent suspensions

Voßkuhle, Michel; Pumir, Alain; Lévêque, Emmanuel and Wilkinson, Michael (2014). Prevalence of the sling effect for enhancing collision rates in turbulent suspensions. Journal of Fluid Mechanics, 749 pp. 841–852.

DOI (Digital Object Identifier) Link: https://doi.org/10.1017/jfm.2014.259
Google Scholar: Look up in Google Scholar

Abstract

Turbulence facilitates collisions between particles suspended in a turbulent flow. Two effects have been proposed that can enhance the collision rate at high turbulence intensities: ‘preferential concentration’ (a clustering phenomenon) and the ‘sling effect’ (arising from the formation of caustic folds in the phase space of the suspended particles). We have determined numerically the collision rate of small heavy particles as a function of their size and densities. The dependence on particle densities allows us to quantify the contribution of the sling effect to the collision rate. Our results demonstrate that the sling effect provides the dominant mechanism to the enhancement of the collision rate of particles, when inertia becomes significant.

Item Type: Journal Item
Copyright Holders: 2014 Cambridge University Press
ISSN: 1469-7645
Keywords: breakup/coalescence, drops and bubbles, turbulent flows
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Mathematics and Statistics
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 41301
Depositing User: Michael Wilkinson
Date Deposited: 13 Nov 2014 10:28
Last Modified: 24 May 2019 08:59
URI: http://oro.open.ac.uk/id/eprint/41301
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU