http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
노관중(Kwan-Joong Noh),박경우(Kyoungwoo Park),이관수(Kwan-Soo Lee) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
A mathematical model of the hydrodynamic and heat transfer performances of two-phase flow (gas-liquid)<br/> in thin film region in a micro channel is developed. For the formulation of modeling, the flow of the vapor<br/> phase and the shear stress at the liquid-vapor interface are considered. In this work, disjoining pressure and<br/> capillary force which drive the liquid flow at the liquid-vapor interface in thin film region are adopted also.<br/> Using the model, the effects of the variations of heat flux on the flow and heat transfer characteristics are<br/> investigated. Results show that the influence of variation of vapor pressure on the liquid film flow is not<br/> significant. The heat flux in thin-film region is the most important operation factor of micro cooler system
마이크로 평판내 증발에 의한 확장초승달영역의 열/유동특성
박경우,노관중,이관수,Park, Kyong-Woo,Noh, Kwan-Joong,Lee, Kwan-Soo 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.4
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.
박경우,노관중,이관수,Park, Kyoung-Woo,Noh, Kwan-Joong,Lee, Kwan-Soo 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.1
A mathematical model of the hydrodynamic and heat transfer performances of two-phase flow (gas-liquid) in thin film region of micro channel is proposed. For the formulation of modeling, the flow of the vapor phase and the shear stress at the liquid-vapor interface are considered. In this work, disjoining pressure and capillary force which drive the liquid flow at the liquid-vapor interface in thin film region are adopted also. Using the model, the effects of the variations of channel height and heat flux on the flow and heat transfer characteristics are investigated. Results show that the influence of variation of vapor pressure on the liquid film flow is not negligible. The heat flux in thin-film region is the most important operation factor of micro cooler system.