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Regimes during liquid drop impact on a liquid pool

Published online by Cambridge University Press:  10 March 2015

Bahni Ray ,
Gautam Biswas  and
Ashutosh Sharma
Bahni Ray
Affiliation:
Department of Mechanical Engineering, City College of City University of New York, New York, NY 10031, USA
Gautam Biswas*
Affiliation:
Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
Ashutosh Sharma
Affiliation:
Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
*
†Email address for correspondence: gtm@iitg.ernet.in
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Abstract

Water drops falling on a deep pool can either coalesce to form a vortex ring or splash, depending on the impact conditions. The transition between coalescence and splashing proceeds via a number of intermediate steps, such as thick and thin jet formation and gas-bubble entrapment. We perform simulations to determine the conditions under which bubble entrapment and jet formation occur. A regime map is established for Weber numbers ranging from 50 to 300 and Froude numbers from 25 to 600. Vortex ring formation is seen for all of the regimes; it is greater for the coalescence regime and less in the case of the thin jet regime.

JFM classification

Drops and Bubbles: Drops Drops and Bubbles: Drops and Bubbles
Type
Papers
Information
Journal of Fluid Mechanics , Volume 768 , 10 April 2015 , pp. 492 - 523
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Copyright
© 2015 Cambridge University Press 

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