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由于颗粒位置矢量和接触矢量难以测量,体积系统理论无法实际应用。对此,本文类比黑体辐射过程对沙堆(λX=0.2)崩坍进行了数值研究,并分别对150目和200目铜粉堆进行了崩坍实验。结果表明:在150目铜粉堆中,崩坍规模m≤0.3g时拟合较好,而崩坍规模m≥0.5g时拟合较差;在200目铜粉堆中,崩坍规模m≤0.5g时拟合较好,而崩坍规模m≥0.8g时拟合较差。这说明体颗粒物质的动力学特性不具有遍历性。本研究还给出了一种求解有效体积的途径,从而为进一步深化颗粒物质体积系综理论研究提供了便利条件。
Due to the difficulty of measuring particle position vector and contact vector, the theory of volume system can not be applied in practice. In this paper, the numerical simulation of the collapses of sand piles (λX = 0.2) compared with the blackbody radiation process was carried out in this paper, and the collapsing experiments of 150 and 200 mesh copper mounds were carried out respectively. The results show that in the 150-watt copper mound, the collapsing scale m is better than or equal to 0.3g, while the collapsing scale m is less than or equal to 0.5g, the fitting is poor. In the 200-mesh copper mound, the collapses scale m≤0.5g When the fit is better, while the collapsing scale m ≥ 0.8g when fitting poor. This shows that the kinetic properties of bulk particulate matter do not have ergodicity. This study also gives a way to solve the effective volume, which provides a convenient condition for the further study on the ensemble theory of the particle volume.