清华大学学报（英文版）
清華大學學報（英文版）
청화대학학보（영문판）
TSINGHUA SCIENCE AND TECHNOLOGY
2010年
4期
404-413
,共10页
蒸汽气泡%传热率%核沸腾%Hamaker常数%Stokes方程%表面换热%边界条件%气泡半径
蒸汽氣泡%傳熱率%覈沸騰%Hamaker常數%Stokes方程%錶麵換熱%邊界條件%氣泡半徑
증기기포%전열솔%핵비등%Hamaker상수%Stokes방정%표면환열%변계조건%기포반경
nucleate boiling%bubble growth%heat transfer%microlayer
Many studies have shown that a very thin liquid microlayer forms under vapor bubbles during nucleate boiling. The heat transfer from the surface to the bubble is then significantly affected by this mi- crolayer and the curved region leading into the microlayer. Various models have been developed to predict the microlayer shape and the heat transfer along the curved interfacial region, but they tend to have incon- sistent boundary conditions or unrealistic results. This paper presents a theoretical model to predict the mi- crolayer thickness and the heat transfer rates for a variety of conditions. The results show how the wall su- perheat, the Hamaker constant, the bubble radius, and the accommodation coefficient at the interface affect the evaporation heat transfer rates and the microlayer shape for a large range of conditions for water and FC 72. The microlayer results are then shown to compare well with predictions made by solving the Na- vier-Stokes equations in the microlayer.
