Surfactant effects on contact line alteration of a liquid drop in a capillary tube

Abstract

Abstract. In this paper, the effect of an insoluble surfactant on the moving contact line of an interface between two fluids filling a capillary tube is studied. The governing equations are the incompressible Navier-Stokes equations with the couple of Eulerian fluid variables and Lagrangian interfacial markers. In our model, capillary force plays a role in the fluids motion. Here, we propose that besides lowering the interfacial tension which affects the capillary force, the surfactant also decreases the surface tension between fluids and a solid surface. That condition is applied to the unbalanced Young condition at the contact line. The front-tracking method is used to solve numerically the free boundary motion of the interface. Results show that the surfactant has a significant effect on the motion of the contact line.

Pengaruh Profitabilitas dan Likuiditas Terhadap Pengungkapan Sustainability Report di Perusahaan Yang Terdaftar Pada Jakarta Islamic Index (JII)

“…Penelitian yang dilakukan Jannah dan Kurnia (2016) serta penelitian Sonia dan Khafid (2020) ditemukan adanya pengaruh profitabilitas dan likuiditas pada pengungkapan sustainability report perusahaan. Sedangkan pada penelitian Aniktia dan Khafid (2015) dan penelitian Yulianti (2015) menghasilkan variabel Profitabilitas, likuiditas tidak berpengaruh pada sustainability report.…”