Emulsifier adsorption kinetics influences drop deformation and breakup in turbulent emulsification
(2023) In Soft Matter 19(46). p.9059-9073- Abstract
Turbulent drop breakup is of large importance for applications such as food and pharmaceutical processing, as well as of substantial fundamental scientific interest. Emulsification typically takes place in the presence of surface-active emulsifiers (natural occurring and/or added). Under equilibrium conditions, these lower the interfacial tension, enabling deformation and breakup. However, turbulent deformation is fast in relation to emulsifier kinetics. Little is known about the details of how the emulsifier influences drop deformation under turbulent conditions. During the last years, significant insight in the mechanism of turbulent drop breakup has been reached using numerical experiments. However, these studies typically use a... (More)
Turbulent drop breakup is of large importance for applications such as food and pharmaceutical processing, as well as of substantial fundamental scientific interest. Emulsification typically takes place in the presence of surface-active emulsifiers (natural occurring and/or added). Under equilibrium conditions, these lower the interfacial tension, enabling deformation and breakup. However, turbulent deformation is fast in relation to emulsifier kinetics. Little is known about the details of how the emulsifier influences drop deformation under turbulent conditions. During the last years, significant insight in the mechanism of turbulent drop breakup has been reached using numerical experiments. However, these studies typically use a highly simplistic description of how the interface responds to turbulent stress. This study investigates how the limited exchange rate of emulsifier between the bulk and the interface influences the deformation process in turbulent drop breakup for application-relevant emulsifiers and concentrations, in the context of state-of-the-art single drop breakup simulations. In conclusion, if the Weber number is high or the emulsifier is supplied at a concentration giving an adsorption time less than 1/10th of the drop breakup time, deformation proceeds as if the emulsifier adsorbed infinitely fast. Otherwise, the limited emulsifier kinetics delays breakup and can alter the breakup mechanism.
(Less)
- author
- Håkansson, Andreas LU and Nilsson, Lars LU
- organization
- publishing date
- 2023-11-20
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Soft Matter
- volume
- 19
- issue
- 46
- pages
- 15 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- scopus:85178264251
- pmid:37982600
- ISSN
- 1744-6848
- DOI
- 10.1039/d3sm01213a
- language
- English
- LU publication?
- yes
- id
- 9ba8fe0b-03fe-499c-9989-fad3b24c7078
- date added to LUP
- 2023-11-21 08:14:44
- date last changed
- 2024-04-20 05:28:46
@article{9ba8fe0b-03fe-499c-9989-fad3b24c7078,
abstract = {{<p>Turbulent drop breakup is of large importance for applications such as food and pharmaceutical processing, as well as of substantial fundamental scientific interest. Emulsification typically takes place in the presence of surface-active emulsifiers (natural occurring and/or added). Under equilibrium conditions, these lower the interfacial tension, enabling deformation and breakup. However, turbulent deformation is fast in relation to emulsifier kinetics. Little is known about the details of how the emulsifier influences drop deformation under turbulent conditions. During the last years, significant insight in the mechanism of turbulent drop breakup has been reached using numerical experiments. However, these studies typically use a highly simplistic description of how the interface responds to turbulent stress. This study investigates how the limited exchange rate of emulsifier between the bulk and the interface influences the deformation process in turbulent drop breakup for application-relevant emulsifiers and concentrations, in the context of state-of-the-art single drop breakup simulations. In conclusion, if the Weber number is high or the emulsifier is supplied at a concentration giving an adsorption time less than 1/10th of the drop breakup time, deformation proceeds as if the emulsifier adsorbed infinitely fast. Otherwise, the limited emulsifier kinetics delays breakup and can alter the breakup mechanism.</p>}},
author = {{Håkansson, Andreas and Nilsson, Lars}},
issn = {{1744-6848}},
language = {{eng}},
month = {{11}},
number = {{46}},
pages = {{9059--9073}},
publisher = {{Royal Society of Chemistry}},
series = {{Soft Matter}},
title = {{Emulsifier adsorption kinetics influences drop deformation and breakup in turbulent emulsification}},
url = {{http://dx.doi.org/10.1039/d3sm01213a}},
doi = {{10.1039/d3sm01213a}},
volume = {{19}},
year = {{2023}},
}