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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 75, 2019 - Issue 2
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Articles

Non-simultaneous impact of multiple droplets on liquid film

Gangtao LiangKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, ChinaCorrespondence[email protected]
ORCID Iconhttp://orcid.org/0000-0002-4126-207XView further author information
ORCID Icon,
Tianyu ZhangKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, ChinaView further author information
,
Yang ChenKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, ChinaView further author information
,
Liuzhu ChenKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, ChinaView further author information
&
Shengqiang ShenKey Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian, ChinaView further author information
Pages 137-147 | Received 22 Oct 2018, Accepted 04 Feb 2019, Published online: 18 Mar 2019
 
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Abstract

Multi-droplet impinging on a thin liquid film non-simultaneously is studied using a three-dimensional numerical model incorporating a random disturbance subjected to Gaussian distribution. Subsequent droplet encountering upward-rising liquid sheets induced by leading droplets results in bubble entrainment with great bubble size. A liquid vortex in the vicinity of entrained bubble is observed. Many capillary waves are produced on the liquid sheet enclosing entrained bubble prior to its breakup, with high pressure beneath crests but low pressure beneath troughs. The criterion devised purposely for a liquid jet breakup can be used to estimate the breakup of enclosed liquid sheet.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant number 51876025] and National Key R&D Program of China [grant number 2016YFC0801306].

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