Issue 28, 2019

Interfacial tension measurements using a new axisymmetric drop/bubble shape technique

Abstract

This paper introduces a new mathematical model that is used to compute either the interfacial tension of quiescent axisymmetric pendant/sessile drops and pendant/captive bubbles. This model consists of the Young–Laplace equation, that describes interface shape, together with suitable boundary conditions that guarantee a prescribed volume of drops/bubbles and a fixed position in the capillary. In order to solve the problem numerically, the Young–Laplace equation is discretized by using numerical differentiation and the numerical solutions are obtained applying the well-know Newton method. The paper contains a validation of the new methodology presented for what theoretical bubble/drops are used. Finally, some numerical results are presented for both drops and bubbles of water as well as several surfactant solutions to demonstrate the applicability, versatility and reproducibility of the proposed methodology.

Graphical abstract: Interfacial tension measurements using a new axisymmetric drop/bubble shape technique

Supplementary files

Article information

Article type
Paper
Submitted
04 Feb 2019
Accepted
07 May 2019
First published
23 May 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 16187-16194

Interfacial tension measurements using a new axisymmetric drop/bubble shape technique

M. A. Cabrerizo-Vilchez, J. R. Fernández, M. A. Fernández-Rodríguez, L. García-Río, M. C. Muñiz and C. Núñez, RSC Adv., 2019, 9, 16187 DOI: 10.1039/C9RA00940J

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