Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session D16: Electrostatic Generation of Sprays and Filaments
3:00 PM–6:00 PM,
Monday, March 6, 2023
Room: Room 208
Sponsoring
Units:
DSOFT DPOLY DFD
Chair: Jonathan Singer, Rutgers University
Abstract: D16.00012 : Electrohydrodynamics of complex emulsions*
5:36 PM–5:48 PM
Author not Attending
Presenter:
Majid Bahraminasr
(Memorial Universty of Newfoundland)
Authors:
Majid Bahraminasr
(Memorial Universty of Newfoundland)
Anand Yethiraj
(Memorial University)
explored in a pioneering paper by G. I. Taylor who formulated the weakly conducting or
leaky dielectric model and predicted the steady drop shape in the small-deformation
limit. Contemporary literature in electrohydrodynamic studies focuses primarily on the
deformations of single droplets. On the other hand, the collective behavior of many
droplets shows a wide range of surprising phenomena.
In the presence of a DC electric field, the electrokinetics at the interface of a drop
governs its deformations, and at higher field amplitudes, drives the system out of
equilibrium into multi-scale dynamical structures that resemble turbulent flow, even
though the system is at very low Reynolds number. In low-frequency AC fields,
electrohydrodynamics is frequency-tunable [1] and drop breakup is controllable enough
to produce roughly monodisperse emulsions. Three-fluid emulsions have been reported
recently [2], but these systems are athermal and highly polydisperse.
As most of the action is at the liquid-liquid interface, changing the complexity of the
emulsion can dramatically alter the dynamic behaviour to a new level. Working under
the hypothesis that electrohydrodynamics can be analogous to thermalizing the system,
this study experimentally examines the electrohydrodynamics of three-fluid emulsions.
*National Science and Engineering Research Council of Canada (RGPIN-2019-04970)
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