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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.
In order to get the macroscopic porosity distribution of liquid aluminum foam, an average velocity-based foam liquid model is proposed.From the flow characteristics of gas-liquid interface on a single Plateau boundary, the interior velocity distribution of plateau boundary is calculated by lattice-Boltzmann method (LBM) The results show that under the same conditions, the average velocity in the plateau boundary of the solid wall in the foam is about 6 ~ 8 times the boundary of the internal plateau, which explains the difference in the rate of the foam liquid in different containers The calculation results of this paper are in good agreement with those of the classical solution and the experimental results, which proves the applicability of the model.