| 徐 承， 金 浩， 郑钦元， 王炤东， 金伟娅.金属丝径大小对液膜流动影响的CFD研究[J].轻工机械,2014,32(1): |
| 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 |
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| DOI： |
| 中文关键词: 气液两相流 丝网填料 数值模拟 液膜 |
| 英文关键词:gas liquid two phase flow wire packing numerical simulation liquid film |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 diameters of metal wire would improve the stability of liquid film, which was significant for improving the mass transfer efficiency between gas and liquid. |
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