金属丝径大小对液膜流动影响的CFD研究  

CFD Simulation of the Effect of Wire Diameter Size on Liquid Film Flow

作　　者：徐承[1] 金浩 郑钦元 王炤东[1] 金伟娅[1] 

机构地区：[1]浙江工业大学化工机械设计研究所,浙江杭州310014 [2]巨化集团公司电化厂,浙江衢州324004 [3]浙江诚信医化设备有限公司,浙江台州318012

出　　处：《轻工机械》2014年第1期32-35,41,共5页Light Industry Machinery

摘　　要：精馏过程气液两相流动分布特征对分离效率具有重要影响,为研究金属丝网波纹填料表面液膜流体动力学特性,建立基于VOF法的液膜在金属丝网表面上的气—液两相逆流CFD模型,并根据液膜流动特点考虑了表面张力动量源项和气液界面作用力动量源项。模拟结果与文献流动形式相符,表明文中提出的CFD液膜流动模型具有一定的可靠性。文中主要考察丝径大小对液膜流动的影响,模拟结果表明适当改变丝径的大小有助于改善液膜的稳定,对于提高丝网填料气液之间的传质效率有重要意义。The hydraulic characteristics of gas-liquid two-phase flow in distillation process are important factors for separation efficiency. A two-phase flow CFD model using the volume of fluid （VOF） method was presented for studying hydrodynamic performance of the falling film on the metal wire, where two momentum source terms, surface tension and interface stress shear were considered. The simulated results agreed well with experimental result from literature, which showed that the CFD model was reliable. This paper mainly investigated the influence of different wire diameter on the flow behavior of liquid film. It was shown that changing film, which was significant for improving the mass transfe diameters of metal wire would improve the stability of liquid r efficiency between gas and liquid.

关 键 词：气液两相流 丝网填料 数值模拟 液膜 

分 类 号：TQ028.4[化学工程]