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

fYear

2015

fDate

7-9 May 2015

Firstpage

573

Lastpage

578

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Topics in Electrical Engineering (ATEE), 2015 9th International Symposium on

Conference_Location

Bucharest

Type

conf

DOI

10.1109/ATEE.2015.7133872

Filename

7133872