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.
| Original language | English |
|---|---|
| Pages (from-to) | 4629-4638 |
| Number of pages | 10 |
| Journal | Soft matter |
| Volume | 15 |
| Issue number | 23 |
| Early online date | 20 May 2019 |
| DOIs | |
| Publication status | Published - 21 Jun 2019 |
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Deep pool water-impacts of viscous oil droplets. / Jain, Utkarsh; Jalaal, Maziyar; Lohse, Detlef; Van Der Meer, Devaraj.
In: Soft matter, Vol. 15, No. 23, 21.06.2019, p. 4629-4638.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Deep pool water-impacts of viscous oil droplets
AU - Jain, Utkarsh
AU - Jalaal, Maziyar
AU - Lohse, Detlef
AU - Van Der Meer, Devaraj
PY - 2019/6/21
Y1 - 2019/6/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85067243144&partnerID=8YFLogxK
U2 - 10.1039/c9sm00318e
DO - 10.1039/c9sm00318e
M3 - Article
VL - 15
SP - 4629
EP - 4638
JO - Soft matter
JF - Soft matter
SN - 1744-683X
IS - 23
ER -