Title: Numerical analysis of onset voltage for the control of droplet from an electrostatic nozzle

Authors: Xiao-Hui Hu, Xuan Hung Nguyen, Yong-Jae Kim, Soo-Hong Lee, Han Seo Ko

Addresses: School of Mechanical Engineering, Sungkyunkwan University, Suwon, KyungGi-Do 440-746, Republic of Korea. ' School of Mechanical Engineering, Sungkyunkwan University, Suwon, KyungGi-Do 440-746, Republic of Korea. ' School of Information and Communication Engineering, Sungkyunkwan University, Suwon, KyungGi-Do 440-746, Republic of Korea. ' School of Mechanical Engineering, Sungkyunkwan University, Suwon, KyungGi-Do 440-746, Republic of Korea. ' School of Mechanical Engineering, Sungkyunkwan University, Suwon, KyungGi-Do 440-746, Republic of Korea

Abstract: An effect of applied electric potential and physico-chemical parameters on a droplet diameter has been analysed numerically. Smaller droplets can be ejected from a nozzle by applying electrostatic potential between the nozzle and liquids. The droplets have been formed up to the onset value of the electric potential, while unstable liquid jets with multiple satellite droplets have been observed at higher electric potentials. Since the developed equations are appropriate only for limited cases, a numerical analysis has been performed in this study to calculate the droplet diameters and the onset voltages accurately by various parameters.

Keywords: electrostatics; onset voltage; electric potential; physico-chemical parameters; droplet diameter; electrostatic nozzles; electrodes; computational fluid dynamics; CFD; unstable liquid jets; satellite droplets.

DOI: 10.1504/PCFD.2011.041018

Progress in Computational Fluid Dynamics, An International Journal, 2011 Vol.11 No.3/4, pp.184 - 188

Published online: 28 Jun 2011 *

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