Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/32590
Title: Collision dynamics and mixing of unequal-size droplets
Authors: Liu, D
Zhang, P 
Law, CK
Guo, Y
Keywords: Droplet collision
Front tracking
Jet formation
Surface energy
Issue Date: 2013
Publisher: Pergamon Press
Source: International journal of heat and mass transfer, 2013, v. 57, no. 1, p. 421-428 How to cite?
Journal: International journal of heat and mass transfer 
Abstract: A computational study based on a front tracking method was conducted by solving an unsteady, axisymmetric Navier-Stokes equation to investigate the mixing efficiency between two colliding droplets subsequent to their merging. Results show that, for droplets of sufficiently dissimilar sizes, the smaller droplet would transform into a mushroom-shaped jet that penetrates into the interior of the larger droplet, and hence greatly facilitates mixing. The jet acquires its energy from the surface energy of the colliding interfaces that are eliminated upon merging. For droplets of similar sizes, jet formation is not favored due to symmetry, and the eliminated surface energy is rapidly dissipated through viscous action of the droplet internal motion. The results qualitatively agree well with previous experimental observations.
URI: http://hdl.handle.net/10397/32590
ISSN: 0017-9310
EISSN: 1879-2189
DOI: 10.1016/j.ijheatmasstransfer.2012.10.023
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