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摘要: 在球体随机堆积模型的基础上,考虑实际平均配位数,利用离散建模软件EDEM对不可变形系数进行拟合,建立了球形粉末烧结多孔介质比表面积的理论模型。与传统模型相比,该模型的适用范围更广。以实际液体爬升实验为实证对象,将伯努利方程与所建模型耦合,对液体爬升高度进行了预测,发现方程计算结果与实验结果相吻合,说明所建模型具有较好的准确性和应用价值。Abstract: The theoretical model of the specific surface area for the porous media sintered by the spherical powders is established by discrete modeling software EDEM, considering the actual average coordination number and the impenetrability parameter, based on the theory of spheres random stacking model. Compared with the conventional model, the established model has a wider range of applications. Taking the actual capillary rise test as the empirical object, the capillary rise height is predicted by coupling Bernoulli equation with the established model, and the prediction results show the agree with the experimental results, indicating that the established model has the good accuracy and application value.
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Key words:
- porous media /
- specific surface area /
- numerical simulation /
- powders /
- sintering
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表 1 不同文献中液体爬升实验参数
Table 1. Experimental parameters of the actual capillary rise test in the different references
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