为了研究降膜结晶过程的相变耦合传热传质过程 ,在混合物理论和实验观察所得的结晶形态及形貌特征的基础上建立了描述降膜结晶过程动量、热量和质量传递的数值模拟模型。该模型的一个重要特点是认为在降膜结晶过程中在熔体液相区和固相区之间存在一薄厚不匀且不断变化的二相区。以二元透明有机熔体 (萘硫茚 )为例 ,针对实验单管降膜结晶器的实际降膜结晶过程动量、热量和质量传递过程进行了数值模拟 ,所得结果在未引入任何经验常数下 ,与实验结果符合较好 In order to study the phase-change heat and mass transfer process during the process of falling film crystallization, a numerical simulation model describing the momentum, heat and mass transfer during the process of falling film crystallization was established on the basis of the crystal morphology and the morphology of the mixture obtained by the theoretical and experimental observations. . An important feature of this model is that there is a two-phase region of varying thickness between the melt and solid-phase regions in the process of falling film crystallization. Taking bivariate transparent organic melt (thionaphthene) as an example, numerical simulation of the momentum, heat and mass transfer process of the actual falling film crystallization process was carried out. The results obtained without any empirical constant , In good agreement with the experimental results