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论文类型：期刊论文

发表时间：2009-06-01

发表刊物：MATERIALS SCIENCE AND TECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：25

期号：6

页面范围：777-783

ISSN号：0267-0836

关键字：Foamed Al; Drainage; Bubble size distribution; Porosity; Polyhedron

摘要：A mathematical model for predicting the evolution of bubble size distribution in Al foams is presented, which takes into account effects of both the coarsening due to gas diffusion between bubbles and the liquid drainage. A bubble size distribution equation and a one-dimensional drainage equation are solved coupledly by a finite difference approach. Comparison with experimental results from the literature shows a general agreement. The model predictions indicate that the bubble size increases exponentially with time that is in good agreement with MacPherson's theory. Furthermore, computational results reveal that bubble size distributions are dependent strongly on the drainage behaviour, the Henry constant, gas diffusivity and surface tension of the Al foam in liquid state.