The Role of the Capillary Pressure Component in the Displacement of Partially Wetting Liquid from the Capillary
Authors: Polyanskiy A.R., Romanov A.S., Semikolenov A.V. | Published: 20.11.2015 |
Published in issue: #11(668)/2015 | |
Category: Aviation, Rocket and Technology | |
Keywords: partially wetting liquid, meniscus, capillary, disjoining pressure, three phase contact, contact angle |
The problem of modelling the process of displacement of partially wetting liquid by gas in a thin capillary is considered in this article. The results of numerical calculations for the investigated model are presented, taking into account the disjoining pressure in the three-phase contact area. Using the displacement of viscous partially wetting liquid by gas in a thin flat capillary as an example, the relative role of the pressure drop in the capillary is investigated. It is shown that a detailed account of the dependency of the dynamic contact angle on the meniscus speed is significant only at low relative speeds, in other words, at relatively small pressure drops in the capillary.
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