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http://dx.doi.org/10.3795/KSME-B.2002.26.10.1451

Effect of Nozzle Material on Drop Size Distribution in Electrohydrodynamic Spraying  

김명찬 (한국과학기술원 기계공학과)
이상용 (한국과학기술원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.26, no.10, 2002 , pp. 1451-1457 More about this Journal
Abstract
When an aqueous liquid such as water having high electric conductivity and high surface tension is discharged from a nozzle under a strong DC electric field, fine drops ranging from 30 to 450 microns can be obtained only through the spindle mode. In the present study, effects of the electric conductivity and the surface wettability of nozzle materials on formation of drops with this mode were investigated. For that, three nozzles with the same size but with different materials were prepared and tested; a stainless steel needle, and a plain and a metal (gold)-coated (except for the tip portion) silica needles. Uniform drops were obtained with the gold-coated silica nozzle over the wider range of the DC voltage input. That is, formation of the liquid cone and detachment of the liquid spindle (ligament) can be more stabilized and frequent with the needles having high electric conductivity but with low surface wettability at their tips.
Keywords
Uniform Droplets; Electrohydrodynamic Spray; Spindle Mode; Surface Wettability; Electric Field;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Kidd, P. W., 1968, 'Parametric Studies with a Single-Needle Colloid Thruster,' J. Spacecraft, Vol. 5, No. 9, pp. 1034-1039   DOI
2 Lohmann, M., Beyerand, H. and Schmidt-Ott, A., 1997, 'Size and Charge Distribution of Liquid Metal Electrospray Generated Particles,' J. Aerosol Sci., Vol. 28, pp. s349-s350   DOI   ScienceOn
3 Atten, A. and Oliveri, S., 1992, 'Charging of Drops Formed by Circular Jet Breakup,' J. Electrostatics, Vol. 29, pp. 73-91   DOI   ScienceOn
4 Kim, M. C., Lee, S. Y., Kim, S. S. and Kim, Y. D., 2001, 'Generation of Uniform Fine Droplets under Spindle Mode in Electrohydrodynamic Atomization,' Trans. KSME, Vol. 25, No. 7, pp. 923-932 (in Korean)   과학기술학회마을
5 Chang, J., Lawless, P. A. and Yamamoto, T., 1991, 'Corona Discharge Processes,' IEEE Transactions on Plasma Science, Vol. 19, No. 6, pp. 1152-1166   DOI   ScienceOn
6 Sato, M., Tkahashi, H., Awazu, M. and Ohshima, T., 1991, 'Production of Ultra-Uniformly-Sized Silica Particles by Applying as Superimposed on dc Voltage,' J. Electrostatics, Vol. 46, pp. 171-176   DOI   ScienceOn
7 Borra, J-P., Camelot, D., Marijinissen , J. C. M. and Scarlett, B., 1997, 'A New Production Process of Powders with Defined Properties by Electro-hydrodynamic Atomization of Liquids and Post-Production Electrical Mixing,' J. Electrostatics, Vol. 40&41, pp. 633-638   DOI   ScienceOn
8 Hoyer, B., Sorensen, G., Jensen, N., Nielsen, D. B. and Larsen, B., 1996, 'Electrostatic Spraying: A Novel Technique for Preparation of Polymer Coatings on Electrodes,' Anal. Chem., Vol. 68, pp. 3840-3844   DOI   ScienceOn
9 Fu, D., 1995, 'Processing of Porcelain Enamel Glass Powders for Electrostatic Spraying,' Powder Technolgy, Vol. 85, pp. 65-69   DOI   ScienceOn
10 Zomeren, A. A. V., Kelder, E. M., Marijnissen, J. C. M. and Schoonman, J., 1994, 'The Production of Thin Films of $LiMn_2O_4$ by Electrospraying,' J. Aerosol Sci., Vol. 25, No. 6, pp. 1229-1235   DOI   ScienceOn
11 Cloupeau, M. and Prunet-Foch, B., 1990, 'Electrostatic Spraying of Liquids: Main Functioning Modes,' J. Electrostatics, Vol. 25, pp. 165-184   DOI   ScienceOn
12 Kim, J. Y., Chu, J. H. and Lee, S. Y., 1999, 'Improvement of Image Processing Technique for Drop Size Measurement,' Atomization and Sprays, Vol. 9, pp. 313-329   DOI