Numerical Investigation of Falling film Distribution outside horizontal tubes
The film distribution and flow conditions outside horizontal tube bundle in Horizontal Falling-film Heat exchanger were investigated with numerical simulation method in this paper. Geometry model and two-dimensional grid model of horizontal tube bundle were established in the simulation. The effect of some factors, such as liquid feeder height, initial inflow velocity and number of tubes, were analyzed based on simulated results. The VOF technique was employed to capture the gas-liquid interface behavior. Simulated results show that the film thickness decreases with the increase of liquid distribution height, and the effect of liquid feeder height on film thickness of upper part of tube is more obvious than that on the lower tube. Liquid membrane thickness increases with the increase of initial inflow velocity. Furthermore, Liquid membrane thickness outside horizontal tubes gradually decreases as the number of tubes increases. These discussions and results can be used to guide the design of falling film heat exchanger under realistic flow conditions.
horizontal tubes falling film volume of fluid numerical simulation
Jinbo Chen Qinggang Qiu
School of Energy and Power Engineering, Dalian University of Technology, Dalian, 116024, P R China
国际会议
The 7th International Conference on Fluid and Thermal Energy Conversion(第七届流动技术与热能转化国际会议 FTEC 2011)
郑州
英文
283-291
2011-09-24（万方平台首次上网日期，不代表论文的发表时间）