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Coalescence and separation in binary collisions of liquid drops

Published online by Cambridge University Press:  26 April 2006

N. Ashgriz  and
J. Y. Poo
N. Ashgriz
Affiliation:
Department of Mechanical and Aerospace Engineering, State University of New York at Buffalo, Buffalo, NY 14260, USA
J. Y. Poo
Affiliation:
Department of Mechanical and Aerospace Engineering, State University of New York at Buffalo, Buffalo, NY 14260, USA
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Abstract

An extensive experimental investigation of the binary collision dynamics of water drops for size ratios of 1. 0.75, and 0.5, for the Weber-number range of 1 to 100, and for all impact parameters is reported. Two different types of separating collisions, namely reflexive and stretching separations, are identified. Reflexive separation is found to occur for near head-on collisions, while stretching separation occurs for large-impact-parameter collisions. The boundaries between both of the separating collisions and coalescence collision are found experimentally. Theoretical models for predictions of the reflexive and stretching separation are also given.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 221 , December 1990 , pp. 183 - 204
Copyright
© 1990 Cambridge University Press

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