Coexisting multiphase and interfacial behaviour of ouzo

Sibley, DN, Goddard, BD, Ouali, FF, Fairhurst, DJ and Archer, AJ, 2025. Coexisting multiphase and interfacial behaviour of ouzo. Physics of Fluids. ISSN 1070-6631 (Forthcoming)

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Abstract

Multi-component liquid mixtures can be both complex and fascinating, with some systems being amenable to simple experimentation at home, giving valuable insight into fundamental aspects of bulk and interfacial phase behaviour. One particularly interesting mixture is the popular drink ouzo, which has charmed both the general public and scientists by virtue of its ability to display spontaneous emulsification when water is added. When these two clear (and potable) liquids are poured into each other, a single milky-coloured liquid is formed. In previous work [Archer et al., Soft Matter 20, 5889 (2024)], the equilibrium phase-diagram for the stable liquid phases of ouzo was captured via experiment and modelling. Here we consider the case when the two liquid phases also coexist with the vapour phase (i.e. along a line of triple points) and within our model uncover the complex bulk phase behaviour for this simple beverage. As a consequence, this leads to some interesting observations, that also apply more widely, about visualising phase diagrams in ternary systems of this type. We also examine the interfacial behaviour, connecting microscopic density functional theory results with macroscopic (Neumann) predictions for the shape of droplets at interfaces.

Item Type:	Journal article
Publication Title:	Physics of Fluids
Creators:	Sibley, D.N., Goddard, B.D., Ouali, F.F., Fairhurst, D.J. and Archer, A.J.
Publisher:	AIP Publishing
Date:	23 January 2025
ISSN:	1070-6631
Identifiers:	Number Type 2374660 Other
Divisions:	Schools > School of Science and Technology
Record created by:	Jeremy Silvester
Date Added:	14 Feb 2025 10:03
Last Modified:	14 Feb 2025 10:03
URI:	https://irep.ntu.ac.uk/id/eprint/53038

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