Modeling of heat transfer in dropwise condensation
Modeling of heat transfer in dropwise condensation
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DOI：
10.1016/s0017-9310(97)00094-x
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发表时间：
1998-01-01
影响因子：
5.2
通讯作者：
AbuOrabi, M
中科院分区：
文献类型：
--
作者：
AbuOrabi, M
一个模型，使用人口平衡的概念来预测的小滴，直接冷凝增长的液滴尺寸分布。由于液滴（通过液滴的传导，汽-液界面阻力，液滴曲率）和由于促进剂层和下降液滴的扫掠效应的传热阻力被纳入模型中，也包括在计算通过一个单一的液滴的传热速率。总的热通量是从液滴尺寸分布和通过单个液滴的传热速率计算的。通过聚结生长的大液滴的液滴尺寸分布从Rose和Glicksman的作品中获得。本文的工作表明，为了充分计算热通量，必须包括由于液滴和促进剂层引起的所有传热阻力。将通过液滴的热传导视为传热的唯一阻力会高估热通量。过高估计的量随着温差的增加而增加。(C)1997年爱思唯尔科学有限公司
A model using the population balance concept is developed to predict the drop size distribution for small drops that grow by direct condensation. The resistances to heat transfer due to the drop (conduction through the drop, vapor-liquid interfacial resistance, drop curvature) and due to the promoter layer and the sweeping effect of falling drops are incorporated into the model and are also included in calculating the heat transfer rate through a single drop. The total heat flux is calculated from the drop size distributions and the heat transfer rate through a single drop. Drop size distribution for large drops that grow by coalescence is obtained from the works of Rose and Glicksman. The work in this paper reveals that to adequately calculate the heat flux, all the resistances to heat transfer due to the drop and the promoter layer have to be included. Considering heat conduction through the drop as the only resistance to heat transfer overestimates the heat flux. The amount of overestimation increases as the temperature difference increases. (C) 1997 Elsevier Science Ltd.