Experimental evaluation of the coalescence efficiencies of colliding water drops

Zev Levin; Benjamin Machnes

doi:10.1007/BF00881213

Experimental evaluation of the coalescence efficiencies of colliding water drops

Zev Levin, Benjamin Machnes

Department of Geophysics

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

Abstract

The coalescence of water drops of sizes comparable to rain drops (200–2500 μm diameter) was investigated. The method used provided a good separation between collision and coalescence effects. The result suggests a dependence of the coalescence efficiency on both the size of the large drop and the ratio of the radii of the interacting drops (p-ratio). The coalescence was observed to rapidly decrease due to bouncing and partial coalescence as the angle of impact increased from head-on to grazing angle. However, some bouncing was observed at very low impact angles.

Original language	English
Pages (from-to)	845-867
Number of pages	23
Journal	Pure and Applied Geophysics
Volume	115
Issue number	4
DOIs	https://doi.org/10.1007/BF00881213 https://doi.org/10.1007/BF00881213
State	Published - 26 Apr 1977

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AB - The coalescence of water drops of sizes comparable to rain drops (200–2500 μm diameter) was investigated. The method used provided a good separation between collision and coalescence effects. The result suggests a dependence of the coalescence efficiency on both the size of the large drop and the ratio of the radii of the interacting drops (p-ratio). The coalescence was observed to rapidly decrease due to bouncing and partial coalescence as the angle of impact increased from head-on to grazing angle. However, some bouncing was observed at very low impact angles.

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Experimental evaluation of the coalescence efficiencies of colliding water drops

Abstract

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