On the shape of a hydrostatic meniscus attached to a corrugated plate or wavy cylinder

Hill, Antonio; Pozrikidis, C.

doi:10.1016/j.jcis.2011.01.040

Cited by 9 publications

(1 citation statement)

References 7 publications

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“…(9) that an interface, which is subject to a prescribed pressure jump and constant surface tension coefficient, has a constant mean curvature. Therefore, if the gravity is negligible, the fluid-fluid interface forms a section of the so-called Delaunay surface [63,64]. As shown in Fig.…”

Section: Critical Pressure For Pores With Arbitrary Cross-sectionmentioning

confidence: 99%

Effects of crossflow velocity and transmembrane pressure on microfiltration of oil-in-water emulsions

Darvishzadeh

Priezjev

2012

Journal of Membrane Science

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a b s t r a c tThis study addresses the issue of oil removal from water using hydrophilic porous membranes. The effective separation of oil-in-water dispersions involves high flux of water through the membrane and, at the same time, high rejection rate of the oil phase. The effects of transmembrane pressure and crossflow velocity on rejection of oil droplets and thin oil films by pores of different cross-section are investigated numerically by solving the Navier-Stokes equation. We found that in the absence of crossflow, the critical transmembrane pressure, which is required for the oil droplet entry into a circular pore of a given surface hydrophilicity, agrees well with analytical predictions based on the Young-Laplace equation. With increasing crossflow velocity, the shape of the oil droplet is strongly deformed near the pore entrance and the critical pressure of permeation increases. We determined numerically the phase diagram for the droplet rejection, permeation, and breakup depending on the transmembrane pressure and shear rate. Finally, an analytical expression for the critical pressure in terms of geometric parameters of the pore cross-section is validated via numerical simulations for a continuous oil film on elliptical and rectangular pores.

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Section: Critical Pressure For Pores With Arbitrary Cross-sectionmentioning

confidence: 99%