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Deformation and initial breakup morphology of viscous emulsion drops in isotropic homogeneous turbulence with relevance for emulsification devices

Håkansson, Andreas LU and Brandt, Luca (2022) In Chemical Engineering Science 253.
Abstract

This study uses numerical experiments to investigate initial breakup morphology for conditions similar to those experienced in an emulsification device (e.g., a high-pressure homogenizer) (Reλ = 33, We = 1–30, μD/μC = 22, ρD/ρC = 0.9, D/η = 22). Results show breakup consisting of two phases: and ‘oscillatory phase’ where the drops are periodically deforming and relaxing, followed by a ‘critical deformation phase’ where the drop deforms continuously until initial breakup. Large drops (We ≥ 13) go directly to the breakup phase and are highly deformed in multiple direction before bursting. Smaller drops (3 ≤ We ≤ 5) are less likely to go directly to the critical deformation phase and... (More)

This study uses numerical experiments to investigate initial breakup morphology for conditions similar to those experienced in an emulsification device (e.g., a high-pressure homogenizer) (Reλ = 33, We = 1–30, μD/μC = 22, ρD/ρC = 0.9, D/η = 22). Results show breakup consisting of two phases: and ‘oscillatory phase’ where the drops are periodically deforming and relaxing, followed by a ‘critical deformation phase’ where the drop deforms continuously until initial breakup. Large drops (We ≥ 13) go directly to the breakup phase and are highly deformed in multiple direction before bursting. Smaller drops (3 ≤ We ≤ 5) are less likely to go directly to the critical deformation phase and more likely to never reach it before exiting the device. These drops break by the formation of a single filament, creating two large fragments and a number of smaller satellites. Several turbulent structures contribute to critical deformation.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
DNS, Drop breakup, Emulsification, Fragmentation, High-pressure homogenizer, Turbulence
in
Chemical Engineering Science
volume
253
article number
117599
pages
18 pages
publisher
Elsevier
external identifiers
  • scopus:85126456471
ISSN
0009-2509
DOI
10.1016/j.ces.2022.117599
language
English
LU publication?
yes
additional info
Funding Information: Dr Marco Crialesi Esposito is gratefully acknowledged for customizing, supplying and supporting AH on using the DNS code, as well as for valuable discussion on turbulence-drop interactions. Prof. Fredrik Innings and Peyman Olad are gratefully acknowledged for valuable discussions on the nature of turbulent drop breakup and homogenization. This research was funded by The Swedish Research Council (VR), grant number 2018–03820, and Tetra Pak Processing Systems AB. Publisher Copyright: © 2022 The Authors
id
1c08c090-668d-45e7-a099-1dd795f630ad
date added to LUP
2022-03-28 06:33:32
date last changed
2023-12-10 01:14:26
@article{1c08c090-668d-45e7-a099-1dd795f630ad,
  abstract     = {{<p>This study uses numerical experiments to investigate initial breakup morphology for conditions similar to those experienced in an emulsification device (e.g., a high-pressure homogenizer) (Re<sub>λ</sub> = 33, We = 1–30, μ<sub>D</sub>/μ<sub>C</sub> = 22, ρ<sub>D</sub>/ρ<sub>C</sub> = 0.9, D/η = 22). Results show breakup consisting of two phases: and ‘oscillatory phase’ where the drops are periodically deforming and relaxing, followed by a ‘critical deformation phase’ where the drop deforms continuously until initial breakup. Large drops (We ≥ 13) go directly to the breakup phase and are highly deformed in multiple direction before bursting. Smaller drops (3 ≤ We ≤ 5) are less likely to go directly to the critical deformation phase and more likely to never reach it before exiting the device. These drops break by the formation of a single filament, creating two large fragments and a number of smaller satellites. Several turbulent structures contribute to critical deformation.</p>}},
  author       = {{Håkansson, Andreas and Brandt, Luca}},
  issn         = {{0009-2509}},
  keywords     = {{DNS; Drop breakup; Emulsification; Fragmentation; High-pressure homogenizer; Turbulence}},
  language     = {{eng}},
  month        = {{05}},
  publisher    = {{Elsevier}},
  series       = {{Chemical Engineering Science}},
  title        = {{Deformation and initial breakup morphology of viscous emulsion drops in isotropic homogeneous turbulence with relevance for emulsification devices}},
  url          = {{http://dx.doi.org/10.1016/j.ces.2022.117599}},
  doi          = {{10.1016/j.ces.2022.117599}},
  volume       = {{253}},
  year         = {{2022}},
}