"Influence of surface viscosities on the electrodeformation of a prolat" by H. Nganguia, D. Das et al.
 

Influence of surface viscosities on the electrodeformation of a prolate viscous drop

Document Type

Article

Publication Date

12-23-2022

Abstract

Contaminants and other agents are often present at the interface between two fluids, giving rise to rheological properties such as surface shear and dilatational viscosities. The dynamics of viscous drops with interfacial viscosities has attracted greater interest in recent years, due to the influence of surface rheology on deformation and the surrounding flows. We investigate the effects of shear and dilatational viscosities on the electro-deformation of a viscous drop using the Taylor-Melcher leaky dielectric model. We use a large deformation analysis to derive an ordinary differential equation for the drop shape. Our model elucidates the contributions of each force to the overall deformation of the drop and reveals a rich range of dynamic behaviors that show the effects of surface viscosities and their dependence on rheological and electrical properties of the system. We also examine the physical mechanisms underlying the observed behaviors by analyzing the surface dilatation and surface deformation.

Identifier

85146159994 (Scopus)

Publication Title

Soft Matter

External Full Text Location

https://doi.org/10.1039/d2sm01307j

e-ISSN

17446848

ISSN

1744683X

PubMed ID

36625263

First Page

776

Last Page

789

Issue

4

Volume

19

Grant

1614863

Fund Ref

National Science Foundation

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