电场中颗粒流量突变行为的理论判据

关于颗粒流在电场中的行为，中科院物理所作了许多实验工作，并得到一些有意义的结果，但对电场中颗粒流量突变条件未作定量研究，而该条件对实验结果分析及预测至关重要，作者用动力学方法导出颗粒流量突变的理论判据，并用该判据对的实验结果作了比较，结果基本吻合。

On the theoretical criterion of mutation of the granular flux in electric field

As to the phenomenon of mutation of the granular flux in electric field, ChenWei ,the doctor of THE INSTITUTE OF PHYSICS, CAS , have done a large number of experiments and got some meaningful results. However,it is very regret that the Doctor ChenWei have not afforded a quantitative criterion of those experiments. We think a quantitative criterion is vital to analyse and forecast the experimental resuits. So, we put forward time and space criterion of the experiments with dynamics method. We explained the experimental results with two quantitative criterions and compared theoretical calculation with the experimental results of changing grain diameter. We found our theoretical calculation is in good agreement with the experimental results.