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논문 상세정보

균일전기장에 의한 기포와 액적의 변형에 관한 연구

A study on the deformation of a bubble and a drop in a uniform electric field

Abstract

In the present study, the characteristics of the electrical deformation of a bubble and a drop under a uniform electric field have been investigated to understand EHD heat transfer enhancement by an electric field. The deformation of the bubble and the drop have been studied theoretically using an electric normal stress acting on their interfaces and assured by the numerical analysis and the experiment. From the variation of bubble volume and free energy, it is found that a bubble is compressed in an electric field and free energy had larger value with increasing W and the permittivity of a dielectric fluid. The electric normal stress induced on the interface of the bubble and the drop is different. Because of the surface charge induced at the drop interface, the electric normal stress acting on the drop is much larger than that of the bubble. The drop is, therefore, deformed much more than the bubble. In addition, the experimental and numerical results show that the aspect ratio and the contact angle of the bubble increase with increasing W.

참고문헌 (22)

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이 논문을 인용한 문헌 (2)

  1. Gwon, Yeong-Cheol ; Kim, Mu-Hwan ; Gang, In-Sik 1997. "Experimental study on nucleate boiling heat transfer enhancement using an electric field" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B, 21(12): 1563~1575 
  2. Bae, Sung-Won ; Lee, Han-Choon ; Kim, Moo-Hwan 2000. "Wall Heat Flux Behavior of Nucleate Pool Boiling Under a Constant Temperature Condition in a Binary Mixture System" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B, 24(9): 1239~1246 

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