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Applied Mathematics Research eXpress (2006) Vol. 2006 : article ID 94630, 8 pages, doi:10.1155/AMRX/2006/94630
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Copyright © 2006 Hindawi Publishing Corporation. All rights reserved.

Inertia-Dominated Coalescence of Drops

H. Aryafar, A. S. Lukyanets and H. P. Kavehpour

Complex Fluids and Interfacial Physics Laboratory, Department of Mechanical and Aerospace Engineering, Henry Samueli School of Engineering and Applied Science, University of California Los Angeles, CA 90095-1597, USA E-mail address: hamarz{at}ucla.edu; E-mail address: kisca{at}ucla.edu; E-mail address: pirouz{at}seas.ucla.edu

During the coalescence of a drop with a planar interface, a hole is generated in the microscopic film that separates the drop from the interface. A bridge forms, connecting the drop to the liquid bulk. An experimental study has been performed to investigate the time dependence of the behavior of the bridge. A high-speed digital camera recorded the process from underneath the interface. During film rupture, the radius of the bridge demonstrated a power-law time dependence. These results agree with the power-law behavior predicted for drop/drop coalescence and we show that when using correct dimensionless forms, they fully agree with numerical simulations for variety of fluid combinations.



References

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This Article
Right arrow Abstract Freely available
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Right arrow Articles by Kavehpour, H. P.
Right arrow Search for Related Content
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What's this?