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AuthorVivacqua, Vincenzino
AuthorGhadiri, Mojtaba
AuthorAbdullah, Aboubakr M.
AuthorHassanpour, Ali
AuthorAl-Marri, Mohammed J.
AuthorAzzopardi, Barry
AuthorHewakandamby, Buddhika
AuthorKermani, Bijan
Available date2021-07-05T10:58:27Z
Publication Date2016
Publication NameChemical Engineering Research and Design
ResourceScopus
URIhttp://dx.doi.org/10.1016/j.cherd.2016.08.015
URIhttp://hdl.handle.net/10576/21055
AbstractA linear dynamic model of water droplet deformation in the presence of an electric field has been developed. Analytical solutions of the differential equation of motion are provided with different waveforms as forcing terms, namely in the case of half-sinusoidal, square and sawtooth waves. The main dimensionless groups are identified as a result of this analysis. The predictions of the model are compared with some data of droplet deformation available in the literature. The calculations based on this model show that the waveform affects the response of the droplet to the electric field stimulus. Resonance is possible only when the droplets are sufficiently large (i.e. for Ohnesorge number less than 1). The oscillation amplitude decreases rapidly with the electric field frequency. A qualitative comparison with some experiments of droplet-interface coalescence available in the literature has also been addressed, suggesting a correlation between the formation of secondary droplets and the amplitude of oscillation of the mother droplet. The outcomes of this analysis can be useful for the selection of the best operating conditions to improve the electrocoalescence process efficiency, as they can provide guidelines to the choice of the most suitable electric field parameters. 2016 Institution of Chemical Engineers
SponsorThis work was made possible by NPRP grant #5-366-2-143 from the Qatar National Research Fund (A Member of The Qatar Foundation). The statements made herein are solely the responsibility of the authors.
Languageen
PublisherInstitution of Chemical Engineers
SubjectElectrocoalescence
Modelling
Partial coalescence
Phase separation
Water-in-oil emulsions
TitleLinear dynamics modelling of droplet deformation in a pulsatile electric field
TypeArticle
Pagination162-170
Volume Number114
dc.accessType Abstract Only


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