Phase-field modelling of a miscible system in spinning droplet tensiometer

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dc.contributor.authorVorobev, Anatoliy
dc.contributor.authorBoghi, Andrea
dc.date.accessioned2016-09-06T16:24:49Z
dc.date.available2016-09-06T16:24:49Z
dc.date.issued2016-07-30
dc.description.abstractThe spinning drop tensiometry is used for measurements of surface tension coefficients, especially, when interfaces are characterised by low and ultra-low interfacial stresses. A droplet of lighter liquid is introduced into a rotating capillary that was initially saturated with another heavier liquid. The tube is subject to axial rotation that results in droplet’s elongation along the tube’s axis. The equilibrium shape of the droplet is used to determine the surface tension coefficient. In this work, the evolution of a slowly miscible droplet introduced into a spinning capillary is investigated. This technique is frequently employed for studies of the dynamics of miscible systems, even despite the fact that a strict equilibrium is never achieved in a mixture of fully miscible liquids. The numerical modelling of a miscible droplet is fulfilled on the basis of the phase-field (Cahn-Hilliard) approach. The numerical results are compared against the experimental data pursuing two objectives: (i) to verify the use of the phase-field approach as a consistent physics-based approach capable of accurate tracking of the short- and long-term evolution of miscible systems, and (ii) to estimate the values of the phenomenological parameters introduced within the phase-field approach, so making this approach a practical tool for modelling of thermohydrodynamic changes in miscible systems within various configurations.en_UK
dc.identifier.citationAnatoliy Vorobev, Andrea Boghi, Phase-field modelling of a miscible system in spinning droplet tensiometer, Journal of Colloid and Interface Science, Volume 482, 15 November 2016, Pages 193-204en_UK
dc.identifier.issn0021-9797
dc.identifier.urihttp://dx.doi.org/10.1016/j.jcis.2016.07.080
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/10496
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen_UK
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectMiscible interfaceen_UK
dc.subjectPhase-field approachen_UK
dc.subjectCahn-Hilliard-Navier-Stokes equationsen_UK
dc.subjectSpinning drop tensiometeren_UK
dc.titlePhase-field modelling of a miscible system in spinning droplet tensiometeren_UK
dc.typeArticleen_UK

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