Abstract
The transport of liquids driven by capillary suction-pressure and balanced by both viscous drag force and gravity acceleration is known as spontaneous imbibition. The prediction of spontaneous imbibition in porous media is of importance due to its relevance as a fundamental phenomenon in numerous industrial technologies as well as in nature. A vast majority of the experimental results and mathematical models concerning the imbibition process of single-phase liquids are considered and analyzed in the literature. The present research focuses on two-phase liquids transport in porous medium driven by capillary force. The penetrating liquids were surfactant-stabilized emulsions with the different dispersed phase concentrations. The discussed issues are the influence of porous bed composition and inner phase concentration on the height of an emulsion penetration, which allows to predict the velocity of imbibition process. From a practical point of view, the experimental results give the possibility to evaluate: productivity of granular sorbents applied to recover the environment, efficiency of building materials wetting with multiphase liquids, process of oil-derived pollutants migration in porous media, e.g. soil and other rock structures, etc.
Highlights
IntroductionThe liquids transport driven by capillary force and counterbalanced by viscous drag force and gravity acceleration is referred in literature as spontaneous imbibition or wicking [1,2,3,4]
The transport of liquids driven by capillary suction-pressure and balanced by both viscous drag force and gravity acceleration is known as spontaneous imbibition
The discussed issues are the influence of porous bed composition and inner phase concentration on the height of an emulsion penetration, which allows to predict the velocity of imbibition process
Summary
The liquids transport driven by capillary force and counterbalanced by viscous drag force and gravity acceleration is referred in literature as spontaneous imbibition or wicking [1,2,3,4]. A great deal of the discussed mathematical models considers the effect of a dynamic contact angle on capillary rise [4, 8, 9]. Another group predicts the spontaneous imbibition in the porous media regarding structural parameters, i.e. porosity, tortuosity and shape of pores [2, 10,11,12]. A lot of approaches confiders both factors: structure of voids and medium saturation [11, 13, 14] This allows for the characterization of the imbibition process in a wide range of granular media such as sorbents, soil, silica glasses, and other rocks. The mentioned concepts are appropriate to predict imbibition process in case of various singlephase liquids, while there is lack of experimental results and mathematical models, which predict wicking of multiphase liquids in granular beds
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