Laminar film condensation on a horizontal wavy plate embedded in a porous medium
Laminar film condensation on a horizontal wavy plate embedded in a porous medium
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DOI：
10.1016/j.ijthermalsci.2007.01.006
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发表时间：
2008
影响因子：
4.5
通讯作者：
Tong-Bou Chang
中科院分区：
文献类型：
--
作者：
Tong-Bou Chang
研究了埋入多孔介质中的等温有限尺寸水平波形板朝上进入干饱和蒸汽区的二维稳态气膜凝结问题。由于毛细效应，在冷板上的液膜和蒸汽区之间形成了一个两相区。以沙-水-蒸汽系统为例，结果表明，液膜分析中的毛细效应对换热系数的计算结果有很大影响。结果还表明，波浪板的波数和波幅对平均努塞尔数Nu‘都有显著影响。
The problem of two-dimensional, steady-state film condensation on an isothermal finite-size horizontal wavy plate embedded in a porous medium is studied for the case in which the plate faces upward into a region of dry saturated vapor. Due to capillary effects, a two-phase zone is formed between the liquid film on the cold plate and the vapor zone. Taking the sand–water–steam system for illustration purposes, the results indicate that the inclusion of capillary effects in the liquid film analysis has a significant effect on the computed results for the heat transfer coefficient. The results also reveal that the wave number and the wave amplitude of the wavy plate both have a significant effect on the mean Nusselt number, Nu¯.