颗粒群组方法中关键参数的选取

为了深入了解颗粒群组方法的特点,提出了修正最大群组数方法,研究了颗粒群组方法中的两个关键参数(体积增量和最大群组数)对数量密度和体积分数的影响.结果表明:传统最大群组数在计算颗粒数量密度时比较准确,修正最大群组数在计算颗粒体积分数时比较准确.随着颗粒体积增量的增加,传统最大群组数得到的颗粒数量密度的预测值降低,而颗粒体积分数的预测值增加.随着颗粒体积增量的增加,修正最大群组数得到的颗粒数量密度的预测值下降,而颗粒体积分数的预测值呈振荡趋势.

Key Parameter Selection in Particle-Size-Grouping Method

In order to have a deep insight into the particle-size-grouping (PSG) method， a modified maximum group number method was developed to study the effects of two key parameters (the particle volume increment and the maximum group number) on the particle number density and volume fraction. The results showed that a more accurate value of the particle number density was obtained by using the PSG method with the traditional maximum group number while a more accurate value of the particle volume fraction was obtained by using the PSG method with the modified maximum group number. With the increase of the particle volume increment， the predicted value of the particle number density decreased， while the predicted value of the particle volume fraction increased when using the PSG method with the traditional maximum group number. With the increase of particle volume increment， the predicted value of the particle number density decreased， while the predicted value of the particle volume fraction showed a trend of oscillation when using the PSG method with the modified maximum group number.