Impact of a high-speed train of microdrops on a liquid pool

被引：22

作者：

Bouwhuis, Wilco ^{[1
,2
]}

Huang, Xin ^{[3
,4
]}

Chan, Chon U. ^{[3
]}

Frommhold, Philipp E. ^{[5
]}

Ohl, Claus-Dieter ^{[3
]}

Lohse, Detlef ^{[1
,2
,6
]}

Snoeijer, Jacco H. ^{[1
,2
,7
]}

van der Meer, Devaraj ^{[1
,2
]}

机构：

[1] Univ Twente, Mesa Inst, Phys Fluids Grp, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, JM Burgers Ctr Fluid Dynam, NL-7500 AE Enschede, Netherlands

[3] Nanyang Technol Univ, Div Phys & Appl Phys, Cavitat Lab, Singapore 637371, Singapore

[4] Natl Univ Singapore, Dept Mech Engn, Fluid Mech Labs, Singapore 117575, Singapore

[5] Univ Gottingen, Inst Phys 3, Christian Doppler Lab Cavitat & Microeros, D-37077 Gottingen, Germany

[6] Max Planck Inst Dynam & Self Org, D-37077 Gottingen, Germany

[7] Eindhoven Univ Technol, Mesoscop Transport Phenomena, NL-5612 AZ Eindhoven, Netherlands

来源：

JOURNAL OF FLUID MECHANICS | 2016年 / 792卷

关键词：

drops; drops and bubbles; microfluidics; INVISCID COALESCENCE; DROP IMPACT; ENTRAINMENT; ENTRAPMENT; DYNAMICS; BUBBLES;

D O I：

10.1017/jfm.2016.105

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A train of high-speed microdrops impacting on a liquid pool can create a very deep and narrow cavity, reaching depths more than 1000 times the size of the individual drops. The impact of such a droplet train is studied numerically using boundary integral simulations. In these simulations, we solve the potential flow in the pool and in the impacting drops, taking into account the influence of liquid inertia, gravity and surface tension. We show that for microdrops the cavity shape and maximum depth primarily depend on the balance of inertia and surface tension and discuss how these are influenced by the spacing between the drops in the train. Finally, we derive simple scaling laws for the cavity depth and width.

引用

页码：850 / 868

页数：19

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