Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Flow and Heat Transfer Characteristics of the Evaporating Extended Meniscus in a Micro Parallel Plate

마이크로 평판내 증발에 의한 확장초승달영역의 열/유동특성

  • 박경우 (한양대학교 최적설계신기술연구센터) ;
  • 노관중 (한양대학교 대학원 기계공학부) ;
  • 이관수 (한양대학교 기계공학부)
  • Published : 2003.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

A mathematical model is presented to predict the two-phase flow and heat transfer phenomena of the evaporating extended meniscus region in a micro-channel. The pressure difference at the liquid-vapor interface can be obtained by the augmented Laplace-Young equation. The correlative equations for film thickness, pressure, and velocity in the meniscus region are derived by applying the mass, momentum, and energy equations into the control volume. The results show that increasing the heat flux and the liquid inlet velocity cause the length and liquid film thickness of the extended meniscus region to decrease. The variation, however, of the heat flux and liquid inlet velocity has no effect on the profile of film thickness. The majority of heat is transferred through the thin film region that is a very small region in the extended meniscus region. It is also found that the vapor velocity increases gradually in the meniscus region. However, it increases sharply at the junction of the meniscus and thin film regions.

Keywords

References

  1. Longtin, J. P., Badran, B. and Gerner, F. M., 1994, 'A One-Dimensional Model of a Micro Heat Pipe During Steady-State Operation,' J. of Heat Transfer, Vol. 116, pp. 709-715 https://doi.org/10.1115/1.2910926
  2. Sartre, V., Zaghdoudi, M. and Lallemand, M., 2000, 'Effect of inerfacial phenomena on evaporative heat transfer in micro heat pipes,' Int. J. Therm. Sci., Vol. 39, pp. 498-504 https://doi.org/10.1016/S1290-0729(00)00205-2
  3. Peles, Y.P. and Haber, S., 2000, 'A study state, one dimensional model for boiling two phase flow in triangular micro-channel,' Int. J. of Multiphase Flow, Vol. 26, pp. 1095-1115 https://doi.org/10.1016/S0301-9322(99)00084-1
  4. Kyoungwoo Park, Kwan-Joong Noh and Kwan-Soo Lee, 2002, 'Transport Phenomena in a Thin film Region of Micro Channel,' Int. J. Heat Mass Transfer, sumitted https://doi.org/10.1016/S0017-9310(02)00541-0
  5. Derjaguin, B.V., Zorin, Z.M., 1957, 'Optical Study of the Absorption and Surface Condensation of Vapors in the Vicinity of Saturation on a Smooth Surface,' Proc. 2nd International Congress on Surface Activity (London), Vol.2, pp. 145-152
  6. Bejan, 1995, Convection Heat Transfer, Second Edition, John Wiley & Sons, Inc., pp. 102-104
  7. Blangetti, F. and Naushahi, M. K., 1980, 'Influence of Mass Transfer on the Momentum Transfer in Condensation and Evaporation Phenomena,' Int. J. Heat Transfer, Vol. 23, pp. 1694-1695 https://doi.org/10.1016/0017-9310(80)90231-8
  8. Khrustalev, D. and Faghri, A., 1997, 'Thick-Film Phenomenon in High-Heat-Flux Evaporation From Cylindrical Pores,' ASME J. of Heat Transfer, Vol.119, pp.272-278 https://doi.org/10.1115/1.2824220
  9. Swanson, L.W. and Herdt, G.C., 1992, 'Model of the Evaporating meniscus in a Capillary Tube,' ASME J. of Heat Transfer, Vol.114, pp.434-441 https://doi.org/10.1115/1.2911292