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Maximal air bubble entrainment at liquid drop impact

Maximal air bubble entrainment at liquid drop impact
Maximal air bubble entrainment at liquid drop impact
At impact of a liquid drop on a solid surface, an air bubble can be entrapped. Here, we show that two competing effects minimize the (relative) size of this entrained air bubble: for large drop impact velocity and large droplets, the inertia of the liquid flattens the entrained bubble, whereas for small impact velocity and small droplets, capillary forces minimize the entrained bubble. However, we demonstrate experimentally, theoretically, and numerically that in between there is an optimum, leading to maximal air bubble entrapment. For a 1.8 mm diameter ethanol droplet, this optimum is achieved at an impact velocity of 0.25??m/s. Our results have a strong bearing on various applications in printing technology, microelectronics, immersion lithography, diagnostics, or agriculture.
1-4
Bouwhuis, Wilco
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van der Veen, Roeland C.A.
853b7c4e-113f-491c-81c8-11b179bfbfdf
Tran, Tuan
ffebef8f-bdad-4428-863b-2ddcf08d1b7e
Keij, Diedrick L.
cf79f676-fde9-44ad-875b-9ffd8661f6d4
Winkels, Koen G.
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Peters, Ivo
222d846e-e620-4017-84cb-099b14ff2d75
van der Meer, Devaraj
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Sun, Chao
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Snoeijer, Jacco H.
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Lohse, Detlef
a4e72495-4a7c-4f36-b482-6066cb11797a
Bouwhuis, Wilco
43b6aadf-38c9-4be4-9720-568002883392
van der Veen, Roeland C.A.
853b7c4e-113f-491c-81c8-11b179bfbfdf
Tran, Tuan
ffebef8f-bdad-4428-863b-2ddcf08d1b7e
Keij, Diedrick L.
cf79f676-fde9-44ad-875b-9ffd8661f6d4
Winkels, Koen G.
f52651df-1bfd-491b-9bc1-958bb08163c8
Peters, Ivo
222d846e-e620-4017-84cb-099b14ff2d75
van der Meer, Devaraj
54e00557-0050-43f5-9efb-a28ea962591c
Sun, Chao
16c59dfc-f89f-47dd-96ec-b4734295f1f8
Snoeijer, Jacco H.
8fdb9a6c-c085-479e-aa19-1c29b2ccdfaf
Lohse, Detlef
a4e72495-4a7c-4f36-b482-6066cb11797a

Bouwhuis, Wilco, van der Veen, Roeland C.A., Tran, Tuan, Keij, Diedrick L., Winkels, Koen G., Peters, Ivo, van der Meer, Devaraj, Sun, Chao, Snoeijer, Jacco H. and Lohse, Detlef (2012) Maximal air bubble entrainment at liquid drop impact. Physical Review Letters, 109 (264501), 1-4. (doi:10.1103/physrevlett.109.264501).

Record type: Article

Abstract

At impact of a liquid drop on a solid surface, an air bubble can be entrapped. Here, we show that two competing effects minimize the (relative) size of this entrained air bubble: for large drop impact velocity and large droplets, the inertia of the liquid flattens the entrained bubble, whereas for small impact velocity and small droplets, capillary forces minimize the entrained bubble. However, we demonstrate experimentally, theoretically, and numerically that in between there is an optimum, leading to maximal air bubble entrapment. For a 1.8 mm diameter ethanol droplet, this optimum is achieved at an impact velocity of 0.25??m/s. Our results have a strong bearing on various applications in printing technology, microelectronics, immersion lithography, diagnostics, or agriculture.

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More information

Accepted/In Press date: 23 May 2012
Published date: 26 December 2012
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 399963
URI: https://eprints.soton.ac.uk/id/eprint/399963
PURE UUID: 4931ed5c-4b34-43ee-97cb-312004862d7f
ORCID for Ivo Peters: ORCID iD orcid.org/0000-0002-3549-3322

Catalogue record

Date deposited: 08 Sep 2016 15:43
Last modified: 05 Nov 2019 01:34

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