CFD Simulation of Liquid Film Flow on Inclined Plates
CFD Simulation of Liquid Film Flow on Inclined Plates
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DOI：
10.1002/ceat.200402018
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发表时间：
2004-10
影响因子：
2.1
通讯作者：
Fanghen Gu;C. Liu;X. Yuan;Guocong Yu
中科院分区：
文献类型：
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作者：
Fanghen Gu;C. Liu;X. Yuan;Guocong Yu
建立了一个基于流体体积（VOF）法的两相流CFD模型，用于预测斜板降膜流的流体力学特性，该模型与规整填料的表面结构相对应。利用所提出的CFD模型，固体表面的微观结构，液体性质和气体流量的流动行为的影响进行了研究。模拟结果表明，在无气流条件下，液体的流动形态取决于平板的微结构，适当的固体表面微结构有利于连续液膜的形成。还发现，液体的性质，特别是表面张力，在确定薄膜图案中起着重要的作用。然而，在气体流动的作用下，有很大不同的液膜图案。较薄的液膜容易破裂，而较厚的液膜即使在较高的气体流量下也能保持连续，这说明在两相逆流流动条件下，影响液膜厚度的所有因素都会影响液膜的形态。
A two-phase flow CFD model using the volume of fluid (VOF) method is presented for predicting the hydrodynamics of falling film flow on inclined plates, corresponding to the surface texture of structured packing. Using the proposed CFD model the influence of the solid surface microstructure, liquid properties and gas flow rate on the flow behavior was investigated. From the simulated results it was shown that under the condition of no gas flow the liquid flow patterns are dependent on the microstructure of the plates, and proper microstructuring of the solid surface will improve the formation of a continuous liquid film. It was also found that liquid properties, especially surface tension, play an important role in determining the thin-film pattern. However, there are very different liquid film patterns under the action of gas flow. Thinner liquid films break easily, but thicker liquid films can remain continuous even at higher gas flow rates, which demonstrates that all factors affecting the liquid film thickness will affect the liquid film patterns under conditions of counter-current two-phase flow.