pendular ring

pendular ring

[′pen·jə·lər ‚riŋ]
(petroleum engineering)
Distribution of two nonmiscible liquids in a porous system; the pendular ring is a state of reservoir saturation in which the wetting phase is not continuous and the nonwetting phase is in contact with some of the solid surface.
References in periodicals archive ?
12) Eckersley and Rudin (13) postulated that air--water surface tension and the negative pressure imposed by the pendular ring can deform the latex at this stage.
45) Water appears to fill the shrinking pore space; no pendular rings were detected to indicate air invasion.
In contrast to drying in warm temperatures, pendular rings can be seen in Fig.