Vivacqua, V, Ghadiri, M orcid.org/0000-0003-0479-2845, Abdullah, AM et al. (5 more authors) (2016) Linear Dynamics Modelling of Droplet Deformation in a Pulsatile Electric Field. Chemical Engineering Research and Design, 114. pp. 162-170. ISSN 0263-8762
Abstract
A 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.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, Elsevier. This is an author produced version of a paper published in Chemical Engineering Research and Design. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Electrocoalescence; Partial coalescence; Modelling; Water-in-oil emulsions; Phase separation |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Institute for Particle Science and Engineering (Leeds) |
Funding Information: | Funder Grant number Qatar National Research Fund NPRP-5-366-2-143 |
Depositing User: | Symplectic Publications |
Date Deposited: | 02 Sep 2016 11:36 |
Last Modified: | 01 Sep 2017 00:28 |
Published Version: | http://dx.doi.org/10.1016/j.cherd.2016.08.015 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.cherd.2016.08.015 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:104276 |