1. Electric field induced sheeting and breakup of dielectric liquid jets.
- Author
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Khoshnevis, Ahmad, Tsai, Scott S. H., and Esmaeilzadeh, Esmaeil
- Subjects
- *
LIQUID dielectrics , *JETS (Fluid dynamics) , *DEFORMATIONS (Mechanics) , *ELECTROSTATIC fields , *ELECTRIC potential , *ELECTRIC field strength - Abstract
We report experimental observations of the controlled deformation of a dielectric liquid jet subjected to a local high-voltage electrostatic field in the direction normal to the jet. The jet deforms to the shape of an elliptic cylinder upon application of a normal electrostatic field. As the applied electric field strength is increased, the elliptic cylindrical jet deforms permanently into a flat sheet, and eventually breaksup into droplets. We interpret this observation--the stretch of the jet is in the normal direction to the applied electric field--qualitatively using the Taylor-Melcher leaky dielectric theory, and develop a simple scaling model that predicts the critical electric field strength for the jet-to-sheet transition. Our model shows a good agreement with experimental results, and has a form that is consistent with the classical drop deformation criterion in the Taylor-Melcher theory. Finally, we statistically analyze the resultant droplets from sheet breakup, and find that increasing the applied electric field strength improves droplet uniformity and reduces droplet size. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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