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Formation of mono-dispersed droplets with electric periodic dripping regime in electrohydrodynamic(EHD) atomization

Chinese Journal of Chemical Engineering 2020年第5期28卷 1241-1249页

作者： Zhentao Wang Qisi Wang Yaosheng Zhang Yimin Jiang Lei Xia School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China

The formation of controllable size and dripping frequency in electrohydrodynamic(EHD)atomization with electric periodic dripping regime are of much interest and importance because of significant and wide applications,such as micro-encapsulation and *** the present study,the experimental and theoretical works were carried out to explore droplet formation in periodic dripping regime in presence of an electric *** dimensionless electric charge carried by each droplet produced is smaller than the 50%of critical value of the Rayleigh limit,where charge-to-mass ratio of droplets was obtained through the deflection distance in the presence of an electric *** droplet in electric periodic dripping regime usually undergoes oscillating deformation,and finally forms a spherical droplet below the tip no more than ten times out diameter of *** droplet size tens of microns to one hundreds of microns decreases with an increase in applied *** the electric dripping mode,droplets size is independent of flow rate and affected by flow rate due to adsorption of surface active species in *** simplified model to predict droplets size was derived from the balance of electric,surface tension and gravity *** droplets size calculated in good agreement with the ***,the dripping frequency of droplets with rang of a few to several hundred hertz obtained from timeresolved images is highly dependent of liquid flow rate and electric *** largest dripping frequency was predicted and in reasonable agreement with the experimental *** electric periodic dripping regime drop-on-demand droplets in size and dripping frequency further our understanding on the formation of identical droplets and are beneficial to many practical applications.

关键词： electric field electric periodic dripping Formation Diameter dripping frequency

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