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http://dx.doi.org/10.3795/KSME-B.2003.27.4.476

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

Park, Kyong-Woo (한양대학교 최적설계신기술연구센터)
Noh, Kwan-Joong (한양대학교 대학원 기계공학부)
Lee, Kwan-Soo (한양대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.27, no.4, 2003 , pp. 476-483 More about this Journal
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
Micro-Plate; Evaporation; Extended Meniscus Region; Two-Phase Flow; Control Volume;
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