Interfacial tension measurements using a new axisymmetric drop/bubble shape technique Cabrerizo Vílchez, Miguel Ángel Fernández, J. R. Fernández Rodríguez, Miguel Ángel García Río, L. Muñiz, M. C. Nuñez, Cristina 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. 2019-10-16T08:22:18Z 2019-10-16T08:22:18Z 2019 info:eu-repo/semantics/article Cabrerizo-Vilchez, M. A., Fernández, J. R., Fernández-Rodríguez, M. A., García-Río, L., Muñiz, M. C., & Núñez, C. (2019). Interfacial tension measurements using a new axisymmetric drop/bubble shape technique. RSC advances, 9(28), 16187-16194. http://hdl.handle.net/10481/57370 10.1039/c9ra00940j eng http://creativecommons.org/licenses/by-nc/3.0/es/ info:eu-repo/semantics/openAccess Atribución-NoComercial 3.0 España The Royal Society of Chemistry