Deformation and initial breakup morphology of viscous emulsion drops in isotropic homogeneous turbulence with relevance for emulsification devices
(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
- Håkansson, Andreas LU and Brandt, Luca
- organization
- publishing date
- 2022-05-18
- 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}}, }