中文摘要：

基于流体体积函数法（volume of fluid，VOF）建立垂直平行平板通道内膜状冷凝传热预测数值模型，膜状冷凝传热传质过程模拟通过在VOF模型守恒方程中施加基于界面能量平衡方法的源项实现。通过数值分析研究发现，在壁面的顶部，冷凝液膜最薄，存在层流区域；冷凝液向下流动，一系列不规则的波纹随之出现；影响冷凝传热的主要因素是蒸汽的流速、液膜厚度及流动状态等。

英文摘要：

The numerical method was adopted to study the filmwise condensation heat transfer. A computational model was developed to predict condensation heat transfer between vertical parallel plates using a VOF model. The interface energy balance theory was specifically adopted to calculate the source terms associated with phase change. It is found that a laminar regime exists at the top of the wall, where the film is the thinnest. A wavy regime appears as a series of regular ripples/waves of condensate moving downwards under the action of both gravity and shear stress in the interface area. The predictions indicate that the condensation heat transfer is influenced by vapor velocity, film thickness and its flow status.