Equilibrium solutions of a sessile drop partially covered by another liquid

RAVAZZOLI, PABLO D.; DIEZ, J. A.; GONZÁLEZ, ALEJANDRO

New York

Workshop; 18th Northeast Complex Fluids and Soft Matter Workshop (NCS18): From Futuristic Materials to Biotechnology; 2023

Columbia University

We study the equilibrium solutions of a sessile drop on top of a horizontal substrate when it is partially covered by another inmiscible liquid, so that part of the drop is in contact with a third fluid (typically, air). This configuration can also be reached when the bottom of a floaating liquid lens reaches the top of a sessile drop on a solid substrate below.In order to obtain the equilibrium state, we consider axial symmetry so that each surface can be treated as a curve to be calculated. At the solid substrate, we consider that curve between the two liquids, makes a contact angle θ, which determines the degree of wettability of the solid by liquid A when surrounded by liquid B.