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

Vosskuhle, M., Pumir, A., Leveque, E., & Wilkinson, M. (2014). Prevalence of the sling effect for enhancing collision rates in turbulent suspensions. Journal of Fluid Mechanics, 749, 841-852. doi:10.1017/jfm.2014.259.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-295A-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-295B-9
Genre: Journal Article

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 Creators:
Vosskuhle, M., Author
Pumir, A.1, Author              
Leveque, E., Author
Wilkinson, M., Author
Affiliations:
1Laboratory for Fluid Dynamics, Pattern Formation and Biocomplexity, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063287              

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Free keywords: breakup/coalescence, drops and bubbles, turbulent flows
 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.

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Language(s): eng - English
 Dates: 2014-05-23
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1017/jfm.2014.259
 Degree: -

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Title: Journal of Fluid Mechanics
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 749 Sequence Number: - Start / End Page: 841 - 852 Identifier: -