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A computational study of fluctuating viscoelastic forces on trapped interfaces in porous media
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Cooper, Laura J. and Sprittles, James E. (2020) A computational study of fluctuating viscoelastic forces on trapped interfaces in porous media. European Journal of Mechanics - B Fluids, 84 . pp. 496-506. doi:10.1016/j.euromechflu.2020.07.010 ISSN 0997-7546.
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Official URL: https://doi.org/10.1016/j.euromechflu.2020.07.010
Abstract
In immiscible liquid–liquid Newtonian flow through a porous medium, one phase often becomes trapped in corners or narrow regions by capillary forces as blobs (e.g. oil ganglia) deep within the matrix, whilst the second flow exhibits a steady and laminar flow (e.g. of water) that has negligible influence on the trapped liquid–liquid interfaces. However, recent microfluidic experiments have shown the situation radically changes when using a viscoelastic liquid, which is capable of exhibiting pore-scale unsteady flow that can deform such interfaces. Here, a computational model is developed which allows us to capture the forces that cause this behaviour and provide a framework for future investigations of this system. In this paper, the forces on trapped interfaces are investigated for the first time. Notably, when the viscoelastic flow becomes unsteady the forces on the trapped interfaces not only fluctuate but also become amplified, thus supporting experimental findings showing they can be used to free such interfaces. At Weissenberg values of 1.5 and above the fluctuations become important and the mean values of the forces on the interfaces decrease as the fluctuations grow.
Item Type: | Journal Article | |||||||||||||||
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Subjects: | Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software Q Science > QC Physics Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Mathematics | |||||||||||||||
Library of Congress Subject Headings (LCSH): | Viscoelastic materials, Fluid mechanics, Porous materials -- Fluid dynamics | |||||||||||||||
Journal or Publication Title: | European Journal of Mechanics - B Fluids | |||||||||||||||
Publisher: | Elsevier Masson | |||||||||||||||
ISSN: | 0997-7546 | |||||||||||||||
Official Date: | November 2020 | |||||||||||||||
Dates: |
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Volume: | 84 | |||||||||||||||
Page Range: | pp. 496-506 | |||||||||||||||
DOI: | 10.1016/j.euromechflu.2020.07.010 | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||
Date of first compliant deposit: | 28 July 2020 | |||||||||||||||
Date of first compliant Open Access: | 23 September 2020 | |||||||||||||||
RIOXX Funder/Project Grant: |
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