Oscillations of free surface at the edge of short capillary tubes

Publication date: Available online 10 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Junfeng Xiao, Xiang Liu, Youming Luo, Jianchao Cai, Jianfeng XuAbstractLiquid gets imbibed into the capillary tube under the influence of capillary pressure. If capillary tube is shorter than Jurin height, oscillations of free surface are observed when contact line is confined by the edge of tube. Through numerical simulations and theoretic analyses, the velocity at the tube edge is determined, and the morphologies of meniscus at different stages of oscillation are identified. Finally, the oscillation period is found to be linearly correlated to rρL/γ through scale analysis, which is also verified by the simulation results. Discoveries in this paper show that new dynamics exists during the conversion between inertia and surface energy.Graphical abstract

Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 11, 2020 Category: Chemistry Source Type: research