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A study on the deformation of a bubble and a drop in a uniform electric field
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 Title & Authors
A study on the deformation of a bubble and a drop in a uniform electric field
Gwon, Yeong-Cheol; Kim, Mu-Hwan; Gang, In-Seok; Cho, Hae-Jung; Kim, Suk-Joon;
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 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.
 Keywords
electrohydrodynamics;Bubble;Drop;Uniform;Electric Field;Deformation;
 Language
Korean
 Cited by
1.
전기장을 이용한 핵비등 열전달 촉진에 관한 실험적 연구,권영철;김무환;강인식;

대한기계학회논문집B, 1997. vol.21. 12, pp.1563-1575 crossref(new window)
2.
일정 벽면 온도 조건에서 이성분 혼합물의 핵비등시 벽면 열유속 거동,배성원;이한춘;김무환;

대한기계학회논문집B, 2000. vol.24. 9, pp.1239-1246 crossref(new window)
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