Coalescence and separation in binary collisions of liquid drops

1990/12/01 by N. Ashgriz, Nasser Ashgriz, J. Y. Poo · 18 citations
Engineering · Materials Science · #Fluid Dynamics and Heat Transfer #Fluid Dynamics Simulations and Interactions #Surface Modification and Superhydrophobicity

paper · doi:10.1017/s0022112090003536

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.

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