Browse > Article
http://dx.doi.org/10.5370/KIEE.2010.59.9.1632

Electrohydrodynamic Water Droplet Ejection Characteristics from a Micro-Water-Nozzle  

Moon, Jae-Duk (경북대 IT대학 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.59, no.9, 2010 , pp. 1632-1637 More about this Journal
Abstract
A micro-water-nozzle, as one of a cooling means of micro-electronic devices, has been proposed and investigated. The I-V characteristics of the micro-water-nozzle and effect of applied voltage on the meniscus formation and deformation and ejection processes of de-ionized water on the micro-water-nozzle tip have been investigated. The water ejection processes, such as a drop formation, a drop deformation, a dripping, a cone jet, and an atomization, were taken place on the micro-water-nozzle tip by the electrohydrodynamic forces acted by the DC and AC high voltages applied on the meniscus of the micro-water-nozzle tip. The I-V characteristics of the micro-water-nozzle-to-plate electrode system were different from that of the same metal-point electrode system, due to the meniscus formation and water droplet ejection at the nozzle tip. The positive and negative DC and AC high voltages showed the water droplets ejection, the ejection rates of 1.8, 1.5 and 1.2 g/h respectively, which, however, showed that the proposed micro-water-nozzle-to-plate electrode system could be used as one of an effective pumping means.
Keywords
Micro-water-nozzle; Corona discharge; Electrohydrodynamics; Droplet ejection; Droplet formation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By SCOPUS : 0
연도 인용수 순위
1 J.-P. Borra, P. Ehouarn, D. Boulaud, "Electrohydrodynamic atomization of water stabilized by glow discharge – operating range and droplet properties," Journal of Aerosol Science, vol. 35, pp. 1313-1332, 2004.   DOI   ScienceOn
2 J.L. Li, "EHD spraying induced by the pulsed voltage superimposed to a bias voltage," Journal of Electrostatics, vol. 65, pp. 750-757, 2007.   DOI   ScienceOn
3 H. Tsubone, B. Komeili, S. Minami, G.D. Harvel, K. Urashima, C.Y. Ching, J.S. Chang, "Flow characteristics of dc wire-non-parallel plate electrohydrodynamic gas pump," Journal of Electrostatics, vol. 66, pp. 115-121, 2008.   DOI   ScienceOn
4 L.E. Lundgaard, G. Berg, A. Pederson, P.J. Nilson, "Eletrocoalescence of water drop pairs in oil," Proceedings of 14th International Conference on Dielectric Liquids, pp.215-219, July 2002.
5 E. Moreau, G. Touchard, "Enhancing the mechanical efficiency of electric wind in corona discharge," Journal of Electrostatics, vol. 66, pp. 39-44, 2008.   DOI   ScienceOn
6 R. Mestiri, R. Hadaji, S.B. Nasrallah, "The electrical discharge as a source of a mechanical energy," Desalination, vol. 220, pp. 468-475, 2008.   DOI   ScienceOn
7 F. Yan, B. Farouk, F. Ko, "Numerical modeling of an electrostatically driven liquid meniscus in the cone-jet mode," Journal of Aerosol Science, vol. 34, pp. 99-116, 2003.   DOI   ScienceOn
8 J.K. Walsh, A.W. Weimer, C.M. Hrenya, "Thermophoretic deposition of aerosol particles in laminar tube flow with mixed convection," Journal of Aerosol Science, vol. 37, pp. 715-734, 2007.
9 정회원, 문재덕, "침심 노즐전극의 전기유체역학적 펌 핑 특성," 전기학회논문지, vol. 57, No. 10, pp. 1812-1817, 2008.   과학기술학회마을
10 J.S. Eow, M. Ghadiri, Mortion, "Deformation and break-up of aqueous drops in oil under high electric field strengths," Chemical Engineering and Processing, vol. 42, pp. 259-272, 2003.   DOI   ScienceOn
11 J.-D. Moon, J.-S. Jung, J.-G. Kim, S.-T. Geum, "An EHD Gas Pump Utilizing a Porous Point Electrode," IEEE Transactions on Dielectrics and Electrical Insulation," vol. 16, No. 3, pp. 622-628, 2009.   DOI
12 P. Atten, J. Seyed-Yagoobi, "Electrohydrodynamically Induced Dielectric Liquid Flow Through Pure Conduction in Point/Plane Geometry," IEEE Transactions on Industry Applications, vol 10, No. 1, pp. 27-36, 2003.
13 문재덕, "침심 노즐전극의 전기 유체역학적 액적 형성 과정," 전기학회논문지, vol. 57, No. 10, pp. 1807-1811, 2008.   과학기술학회마을
14 A. Jaworek, A. Krupa, "Studies of the corona discharge in EHD spraying," Journal of Electrostatics, vol. 40 & 41, pp. 173-178, 1997.   DOI   ScienceOn
15 A. Castellanos (ed), Electrohydrodynamics, CISM Cources and Lectures No 380, Springer, 1998.
16 J.D. Moon, D.-H. Lee, T.-G. Kang, K.-S. Yon, "A Capacitive type of electrostatics spraying nozzle," Journal of Electrostatics, vol. 57, pp. 363-379, 2003.   DOI   ScienceOn
17 B. Komeili, J.S. Chang, G.D. Harvel, C.Y. Ching, "Electrohydrodynamically Enhanced Capillary Evaporator," International Symposium on New Plasma and Electrical Discharge Applications and on Dielectric Materials, pp. 111-116, Aug. 2007.