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论文类型：期刊论文

发表时间：2012-02-01

发表刊物：CANADIAN JOURNAL OF CHEMICAL ENGINEERING

收录刊物：SCIE、EI、Scopus

卷号：90

期号：1

页面范围：61-68

ISSN号：0008-4034

关键字：interfacial waves; flow dynamics; eddy; LiBr; surface tension; viscosity

摘要：Numerical simulation has been made on wave behaviour and flow dynamics of falling films of aqueous lithium bromide solution along a vertical wall in the present study. Volume of fluid model is used to track the free surfaces and continuum surface force model is used for dynamic boundary conditions considering the effect of surface tension. A small amplitude forcing perturbation is introduced at the inlet of the flow boundary. Effect of surface tension and viscosity on wave behaviour and flow dynamics has been investigated. The simulation results indicate that wave peak height decreases with increasing surface tension and the number of capillary waves in front of a large wave increases. With the decrease of viscosity wave shape changes from the sinusoidal shape to the solitary one. Furthermore, the flow dynamics underneath the typical waves are analysed, especially the pattern of backflow.