Liquid bridge in slit pore geometry
Junhui Hu 1,   Mengjiao Wu 1,   Kezhao Bai 1,   Li Yang 1  
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College of Physics Science and Technology, Guangxi Normal University, Guilin, China
Li Yang   

College of Physics Science and Technology,, Guangxi Normal University,, China
Submission date: 2020-05-21
Final revision date: 2020-09-20
Acceptance date: 2020-10-18
Online publication date: 2020-12-02
Publication date: 2021-01-15
Journal of Theoretical and Applied Mechanics 2021;59(1):135–142
In this work, the morphology of a liquid bridge in a slit pore geometry was investigated as a function of both the bridge height and aspect ratio (height/width). The end contour interface of the liquid bridge was modeled by using a saddle shape, and the liquid-air interface was described via an arc of a circle. By employing the free energy approach, a simple formula was obtained to predict variation of the pinning angle as a function of the distance between the slits. The pinning angle depended on the liquid volume and on both the wetting properties and the geometry of the system (height and width). The critical aspect ratio at which the liquid bridge meniscus transitioned from concave to convex was determined. The calculations were in good agreement with the experimental data. The morphology of the liquid bridges in a slit pore geometry can be used in various fields such as the packaging of electronic and micro-electromechanical systems.
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