中文摘要：

为得到液态泡沫铝的宏观孔隙率分布，提出基于平均速度的泡沫析液模型．从单条Plateau边界上气液界面的流动特征入手，利用格子—Boltzmann方法（LBM）计算plateau边界内部速度分布并将其应用于整体泡沫的析液过程．结果表明：在相同条件下，泡沫体内固壁处plateau边界内平均速度约为内部plateau边界的6～8倍，解释了不同容器内泡沫体析液速率差异的原因．本文模型计算结果与经典析液模型以及实验结果较吻合，证明了模型的可适用性．

英文摘要：

A model for liquid drainage was developed based on average velocity to get the macroporosity distribution of aluminum foam in liquid state. The lattice-Boltzmann method （LBM） was used to calculate velocity distribution inside the plateau border, which applied in whole drainage process from the foam starting with the flow characteristic of liquid-vapor interface on the plateau border. Results show that the average velocity in exterior plateau border is about 6-8 times as large as that in interior during drainage process at the same conditions, which explained the differences of drainage velocity in different vessels.The calculation results match well with the classical drainage equation and its experimental results, which testifies the applicability of the proposed model.