NDLI: Liquid–Liquid Flow in Irregular Triangular Capillaries Under Different Wettabilities and Various Viscosity Ratios

Content Provider	Springer Nature Link
Author	Long, Long Li, Yajun Dong, Mingzhe
Copyright Year	2016
Abstract	An attempt is made to model liquid–liquid two-phase flow inside irregular triangular cross-sectional capillaries. In a triangular capillary, the distribution of two immiscible liquids is determined by a particular threshold pressure, and the interface curvature and profile of the meniscus of the two fluids are derived and analyzed. Three hundred and sixty cases of steady-state two-phase flow were calculated using six triangular shapes, 12 contact angles ranging from 5 $$^{\circ }$$ to $$60^{\circ }$$ , five oil-to-water viscosity ratios from 1.0 to 500, and three different tube sizes. The relative permeability curves of oil and water flow in different triangular capillaries, with different contact angles and oil-to-water viscosity ratio, can be integrated into a pair of curves. Moreover, each of these curves reveals an approximately linear relative permeability law. The results illustrate that relative permeability is independent not only of the size of the capillary, but also of its shape, meaning that relative permeability is independent of the geometry of the capillary. The results of this study reveal, for the first time, that two-phase flow behavior in the triangular cross-sectional capillaries is generally independent of the geometric property of the capillary. The detailed velocity field of flow, with different viscosities, is shown to illustrate the effect of viscosity on the velocity distribution. Modeling of the case of thin water films residing between the non-wetting phase and the inner wall indicates the presence of a lubricating effect of a low-viscosity fluid on a high-viscosity fluid at very low water saturation conditions.
Starting Page	79
Ending Page	100
Page Count	22
File Format	PDF
ISSN	01693913
Journal	Transport in Porous Media
Volume Number	115
Issue Number	1
e-ISSN	15731634
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-08-10
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Two-phase flow Triangular capillary Shape factor Relative permeability Lubricating effect Geotechnical Engineering & Applied Earth Sciences Industrial Chemistry/Chemical Engineering Hydrology/Water Resources Civil Engineering Hydrogeology Classical and Continuum Physics
Content Type	Text
Resource Type	Article
Subject	Catalysis

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