Numerical simulation of surfactant-laden emulsion formation in an un-baffled stirred vessel
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
The present study aims to elucidate the interplay among the interfacial dynamics, surfactant transport, and underlying flow structures inside a cylindrical stirred vessel equipped with a pitched blade turbine. To address this, massively parallel three-dimensional, interface-tracking, large eddy simulations of oil-in-water dispersions are deployed to provide detailed, realistic visualisations of the intricate interfacial dynamics coupled to the turbulent flow field. In particular, we isolate the effect of surfactant arising from interfacial tension reduction and Marangoni stress (related to surfactant concentration gradient) by comparing two surfactant-laden systems, one being a realistic and experiment-achievable case, and another a simulation-exclusive system where the Marangoni stress is turned off. This comparison consists of qualitative interface visualisation as well as quantitative statistics in terms of dispersed phases counts and their size distribution. Finally, surfactant elasticity is modified with the aim of exploring its effect on the targeted mixing system.
Date Issued
2023-09-15
Date Acceptance
2023-07-12
Citation
Chemical Engineering Journal, 2023, 472
ISSN
1385-8947
Publisher
Elsevier
Journal / Book Title
Chemical Engineering Journal
Volume
472
Copyright Statement
© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:001049923200001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
ADSORPTION
BREAK-UP
DEFORMATION
DISPERSIONS
DROP SIZE DISTRIBUTION
DYNAMICS
Engineering
Engineering, Chemical
Engineering, Environmental
FLOW PATTERNS
INSOLUBLE SURFACTANTS
INTERFACIAL PROPERTIES
LES
Mixing
MULTIPLE COMPARISONS
Science & Technology
Surfactant
Technology
Two-phase flow
Un-baffled stirred mixer
Publication Status
Published
Article Number
144807
Date Publish Online
2023-07-17