Physics of Fluids - Publications

Deep pool water-impacts of viscous oil droplets

Open Access
Soft Matter 15, 4629–4638 (2019)
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Authors

	Utkarsh Jain
	Maziyar Jalaal
	Detlef Lohse
	Devaraj van der Meer

BibTeΧ

@Article{C9SM00318E,
author ="Jain, Utkarsh and Jalaal, Maziyar and Lohse, Detlef and van der Meer, Devaraj",
title  ="Deep pool water-impacts of viscous oil droplets",
journal  ="Soft Matter",
year  ="2019",
volume  ="15",
issue  ="23",
pages  ="4629-4638",
publisher  ="The Royal Society of Chemistry",
doi  ="10.1039/C9SM00318E",
url  ="http://dx.doi.org/10.1039/C9SM00318E",
abstract  ="We experimentally study the impacts of viscous{,} immiscible oil drops into a deep pool of water. Within the target liquid pool{,} the impacting drop creates a crater{,} whose dynamics are studied. It is found that the inertia of pool liquid and drop viscosity are the main factors that determine the crater{'}s maximum depth{,} while the additional factor of mutual immiscibility between the drop and pool liquids leads to interesting interfacial dynamics along the oil–water interface. We discuss how this can change the crater dynamics in its retraction phase{,} making possible a type of double-entrainment{,} whereby a tiny air bubble is entrapped inside a water-entrained oil drop. Further{,} we report the observation of a type of ‘fingering’ that occurs along the oil-drop rim{,} which we discuss{,} arises as a remnant of the well-known crown-splash instability."}