Electrohydrodynamic viscous fingering of leaky dielectric fluids in a channel
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Description
Viscous fingering is a commonly observed interfacial instability during fluid displacement, where a fingerlike shape is formed at the fluid interface when a more viscous fluid is displaced by a less viscous fluid. In this study, a hybrid numerical model based on the lattice Boltzmann method and finite difference method is developed for investigating the control of viscous fingering of leaky dielectric fluids confined in a channel using electrohydrodynamics. Extensive simulations are carried out for studying the effects of the strength and direction of the electric field as well as the fluid properties, including the permittivity ratio and conductivity ratio, on viscous fingering. It is shown that a horizontal electric field, i.e., when the direction of the electrical field is perpendicular to the direction of fluid motion, can either promote or suppress the viscous fingering, depending on the permittivity ratio and conductivity ratio. For a vertical electric field, the extent of promotion of viscous fingering first decreases and then increases with the increase in conductivity ratio at a constant permittivity ratio. Also, various interfacial morphologies, such as broad fingers and thin jets, are observed under different fluid properties. A phase diagram for both the horizontal and vertical electric field is established based on the simulations with different permittivity and conductivity ratios to characterize the interfacial morphologies. This study offers insight into the electrohydrodynamic effects on the viscous fingering of leaky dielectric fluids, which could facilitate the control of multiphase flow in various applications, such as enhanced oil recovery and coupled chromatographic systems for separation.
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ID Code: | 238883 | ||||||
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Item Type: | Contribution to Journal (Journal Article) | ||||||
Refereed: | Yes | ||||||
ORCID iD: |
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Additional Information: | Funding Information: We acknowledge the High-Performance Computing facilities at Queensland University of Technology. E. Sauret is the recipient of an Australian Research Council (ARC) Future Fellowship (No. FT200100446), funded by the Australian government. J. Zhao gratefully acknowledges the ARC for support through a Ph.D. scholarship (No. FT200100446). | ||||||
Measurements or Duration: | 11 pages | ||||||
DOI: | 10.1063/5.0140068 | ||||||
ISSN: | 1070-6631 | ||||||
Pure ID: | 128532666 | ||||||
Divisions: | Current > Research Centres > Centre for Materials Science Current > QUT Faculties and Divisions > Faculty of Science Current > QUT Faculties and Divisions > Faculty of Engineering Current > Schools > School of Mechanical, Medical & Process Engineering |
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Funding Information: | We acknowledge the High-Performance Computing facilities at Queensland University of Technology. E. Sauret is the recipient of an Australian Research Council (ARC) Future Fellowship (No. FT200100446), funded by the Australian government. J. Zhao gratefully acknowledges the ARC for support through a Ph.D. scholarship (No. FT200100446). | ||||||
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Copyright Owner: | 2023 The Authors | ||||||
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||||||
Deposited On: | 28 Mar 2023 04:43 | ||||||
Last Modified: | 14 Jun 2024 13:19 |
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