Thickness of residual wetting film in liquid-liquid displacement Beresnev, Igor Gaul, William Vigil, R. Dennis
dc.contributor.department Chemical and Biological Engineering 2018-02-13T21:56:07.000 2020-06-30T01:10:54Z 2020-06-30T01:10:54Z Sat Jan 01 00:00:00 UTC 2011 2014-02-25 2011-08-29
dc.description.abstract <p>Core-annular flow is common in nature, representing, for example, how streams of oil, surrounded by water, move in petroleum reservoirs. Oil, typically a nonwetting fluid, tends to occupy the middle (core) part of a channel, while water forms a surrounding wall-wetting film. What is the thickness of the wetting film? A classic theory has been in existence for nearly 50 years offering a solution, although in a controversial manner, for moving gas bubbles. On the other hand, an acceptable, experimentally verified theory for a body of one liquid flowing in another has not been available. Here we develop a hydrodynamic, testable theory providing an explicit relationship between the thickness of the wetting film and fluid properties for a blob of one fluid moving in another, with neither phase being gas. In its relationship to the capillary number Ca, the thickness of the film is predicted to be proportional to Ca2 at lower Ca and to level off at a constant value of ∼20% the channel radius at higher Ca. The thickness of the film is deduced to be approximately unaffected by the viscosity ratio of the fluids. We have conducted our own laboratory experiments and compiled experimental data from other studies, all of which are mutually consistent and confirm the salient features of the theory. At the same time, the classic law, originally deduced for films surrounding moving gas bubbles but often believed to hold for liquids as well, fails to explain the observations.</p>
dc.description.comments <p>This article is from Physical Review E 84 (2011): 026327, DOI: 10.1103/PhysRevE.84.026327. Posted with permission</p>
dc.format.mimetype application-pdf
dc.identifier archive/
dc.identifier.articleid 1089
dc.identifier.contextkey 5205444
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath cbe_pubs/90
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 02:26:34 UTC 2022
dc.source.uri 10.1103/PhysRevE.84.026327
dc.subject.disciplines Biological Engineering
dc.subject.disciplines Biology and Biomimetic Materials
dc.subject.disciplines Chemical Engineering
dc.subject.keywords Geological and Atmospheric Sciences
dc.title Thickness of residual wetting film in liquid-liquid displacement
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isOrgUnitOfPublication 86545861-382c-4c15-8c52-eb8e9afe6b75
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