Title :
Coalescence of liquid drops with free surfaces
Author :
Omocea, Ioana Laura ; Balan, Catalin Mihai ; Senez, Vincent ; Balan, Corneliu
Author_Institution :
REOROM Lab., Politeh. Univ. of Bucharest, Bucharest, Romania
Abstract :
The present study investigates the coalescence phenomenon of pendant drops in the presence of liquid free surfaces. The experimental setup is composed of a glass cell placed on a lab-jack and a needle connected to a micro-syringe which controls the volume of the droplet. We acquired videos over the dynamics of the phenomenon with a fast CMOS camera attached to an objective with a microscopic magnification. Depending on the fluids properties (in our case water, respectively solutions of glycerin in water) and the distance between the needle and the fluid surface, the coalescence phenomenon evolves in different manners. The study emphasizes the effect of viscosity over the dynamics of the droplet and on the evolution of the capillary bridge between the needle and the free surface.
Keywords :
capillarity; drops; flow control; flow visualisation; organic compounds; surface waves (fluid); two-phase flow; viscosity; volume control; capillary bridge evolution; fast CMOS camera; glass cell; glycerin solutions; lab-jack; liquid drop coalescence; liquid free surfaces; microsyringe; needle; pendant drop coalescence; video acquisition; viscosity effect; volume controls; water; Bridges; Liquids; Needles; Surface tension; Surface waves; Viscosity; capillary bridge; coalescence; pendant drop; surface wave;
Conference_Titel :
Advanced Topics in Electrical Engineering (ATEE), 2015 9th International Symposium on
Conference_Location :
Bucharest
DOI :
10.1109/ATEE.2015.7133872
