山东建筑大学学报2016，Vol.31Issue(1)：14-18,32,6.
降膜蒸发器传热传质与流动过程数值模拟
Numerical study on flow,heat and mass transfer characteristics of horizontal-tube falling-film evaporators
杨新飞 1郭延柱 1任丽 1王海蕊 1于朋玲2
作者信息
- 1. 山东省环境保护科学研究设计院,山东 济南250013
- 2. 山东省化工研究院,山东 济南250014
- 折叠
摘要
Abstract
A mathematical model with phase transition was set up based on the principles of fluid dynamics and VOF multiphase flow model. The falling film evaporation procedure code was embedded in FLUENT through the user define functions( UDF). The principles in the circumferential direction of wall film thickness,velocity,temperature,mass transfer rate and local heat transfer coefficient was analyzed. Results show that the thickness of falling film was rather thin when the X was about 0. 5~0. 8,and this is good for the process of the heat transfer. The bottom and the top of the tube have the large value of local heat transfer coefficient,and the biggest value occurs at the top of the tube. In the circumferential direction,the surplus temperature increases with the distance grows,causing the biggest surplus temperature and evaporation rate at the bottom of the tube. The numerical result is in good agreement with the experimental and predicted data in literature,which means that the mathematical model with heat and mass transfer is reasonable and more comprehensive,and can be used in studying the flow,heat and mass transfer characteristics of falling water film outside horizontal tubes.关键词
降膜/蒸发/数值模拟/传热/传质Key words
falling film/evaporation/numerical simulation/heat transfer/mass transfer分类
资源环境引用本文复制引用
杨新飞,郭延柱,任丽,王海蕊,于朋玲..降膜蒸发器传热传质与流动过程数值模拟[J].山东建筑大学学报,2016,31(1):14-18,32,6.
