Dilute Oil-in-Water Emulsion Initiates Multiple Holes Formation During Bubble Bursting

Hongtao Qian; Zhengyu Yang; Xiaofei Zhang; Jie Feng; Cheng Li

doi:10.2139/ssrn.4317627

Dilute Oil-in-Water Emulsion Initiates Multiple Holes Formation During Bubble Bursting

Hongtao Qian, Zhengyu Yang, Xiaofei Zhang, Jie Feng^*, Cheng Li^*

^*Corresponding author for this work

Mechanical Engineering (Robotics)

Research output: Contribution to journal › Article › peer-review

Abstract

The air bubble bursting dynamics involve intricate interfacial phenomena of millisecond timescale, which are of interest in many natural and industrial processes. The current study concerns bubble containing oil droplets with size comparable to bubble cap thickness. The assumption is that the dynamics of bubble bursting and aerosol formation will be modified as oil droplets interact with the air-water interface during drainage. Indeed, the experiments show that with the increase of the droplet spreading coefficient (S), the average film retraction speed decreases and the average film thickness increases at breakup. Notably, as S reaches 3.6 mN/m, a distinct multiple hole formation phenomenon has been observed for the first time during bubble bursting. The frequency of multiple hole formation increases with increasing S, and is as high as 22 holes per bursting event observed when S = 21.3 mN/m. The multiple holes evolve with time and form convoluted ligament structures that finally break up into much more aerosolized droplets. However, after normalization, all droplet size distribution is well predicated by a Gamma distribution.The results highlight the importance of the interfacial physiochemistry for the bubble cap rupture, regarding the wetting state between the oil droplets, air, water phase.

Original language	English
Journal	SSRN Electronic Journal
DOIs	https://doi.org/10.2139/ssrn.4317627
State	Published - 4 Jan 2023

Keywords

air bubble bursting
oil-in-water emulsion
digital inline holography
aerosol formation
droplet size distribution

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10.2139/ssrn.4317627

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title = "Dilute Oil-in-Water Emulsion Initiates Multiple Holes Formation During Bubble Bursting",

abstract = "The air bubble bursting dynamics involve intricate interfacial phenomena of millisecond timescale, which are of interest in many natural and industrial processes. The current study concerns bubble containing oil droplets with size comparable to bubble cap thickness. The assumption is that the dynamics of bubble bursting and aerosol formation will be modified as oil droplets interact with the air-water interface during drainage. Indeed, the experiments show that with the increase of the droplet spreading coefficient (S), the average film retraction speed decreases and the average film thickness increases at breakup. Notably, as S reaches 3.6 mN/m, a distinct multiple hole formation phenomenon has been observed for the first time during bubble bursting. The frequency of multiple hole formation increases with increasing S, and is as high as 22 holes per bursting event observed when S = 21.3 mN/m. The multiple holes evolve with time and form convoluted ligament structures that finally break up into much more aerosolized droplets. However, after normalization, all droplet size distribution is well predicated by a Gamma distribution.The results highlight the importance of the interfacial physiochemistry for the bubble cap rupture, regarding the wetting state between the oil droplets, air, water phase.",

keywords = "air bubble bursting, oil-in-water emulsion, digital inline holography, aerosol formation, droplet size distribution",

author = "Hongtao Qian and Zhengyu Yang and Xiaofei Zhang and Jie Feng and Cheng Li",

year = "2023",

month = jan,

day = "4",

doi = "10.2139/ssrn.4317627",

language = "英语",

journal = "SSRN Electronic Journal",

issn = "1556-5068",

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TY - JOUR

T1 - Dilute Oil-in-Water Emulsion Initiates Multiple Holes Formation During Bubble Bursting

AU - Qian, Hongtao

AU - Yang, Zhengyu

AU - Zhang, Xiaofei

AU - Feng, Jie

AU - Li, Cheng

PY - 2023/1/4

Y1 - 2023/1/4

N2 - The air bubble bursting dynamics involve intricate interfacial phenomena of millisecond timescale, which are of interest in many natural and industrial processes. The current study concerns bubble containing oil droplets with size comparable to bubble cap thickness. The assumption is that the dynamics of bubble bursting and aerosol formation will be modified as oil droplets interact with the air-water interface during drainage. Indeed, the experiments show that with the increase of the droplet spreading coefficient (S), the average film retraction speed decreases and the average film thickness increases at breakup. Notably, as S reaches 3.6 mN/m, a distinct multiple hole formation phenomenon has been observed for the first time during bubble bursting. The frequency of multiple hole formation increases with increasing S, and is as high as 22 holes per bursting event observed when S = 21.3 mN/m. The multiple holes evolve with time and form convoluted ligament structures that finally break up into much more aerosolized droplets. However, after normalization, all droplet size distribution is well predicated by a Gamma distribution.The results highlight the importance of the interfacial physiochemistry for the bubble cap rupture, regarding the wetting state between the oil droplets, air, water phase.

AB - The air bubble bursting dynamics involve intricate interfacial phenomena of millisecond timescale, which are of interest in many natural and industrial processes. The current study concerns bubble containing oil droplets with size comparable to bubble cap thickness. The assumption is that the dynamics of bubble bursting and aerosol formation will be modified as oil droplets interact with the air-water interface during drainage. Indeed, the experiments show that with the increase of the droplet spreading coefficient (S), the average film retraction speed decreases and the average film thickness increases at breakup. Notably, as S reaches 3.6 mN/m, a distinct multiple hole formation phenomenon has been observed for the first time during bubble bursting. The frequency of multiple hole formation increases with increasing S, and is as high as 22 holes per bursting event observed when S = 21.3 mN/m. The multiple holes evolve with time and form convoluted ligament structures that finally break up into much more aerosolized droplets. However, after normalization, all droplet size distribution is well predicated by a Gamma distribution.The results highlight the importance of the interfacial physiochemistry for the bubble cap rupture, regarding the wetting state between the oil droplets, air, water phase.

KW - air bubble bursting

KW - oil-in-water emulsion

KW - digital inline holography

KW - aerosol formation

KW - droplet size distribution

U2 - 10.2139/ssrn.4317627

DO - 10.2139/ssrn.4317627

M3 - 文章

SN - 1556-5068

JO - SSRN Electronic Journal

JF - SSRN Electronic Journal

ER -

Dilute Oil-in-Water Emulsion Initiates Multiple Holes Formation During Bubble Bursting

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Keywords

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