本文在第一报及第二报所获的颗粒群动态实验及分析结果的基础上,设想颗粒群给堆积层上的力是均衡的,研究颗粒群的动态与压头损失的关系。作者从实验中及理论上已经确认,圆形管内堆积层上的颗粒,以跳跃形式输送,但是,应考虑到沉降性颗粒的情况,由于颗粒 In this paper, based on the dynamic experiments and analysis results of the first group and the second group, it is assumed that the forces exerted by the particle group on the accumulation layer are balanced, and the relationship between the dynamics of the particle group and the head loss is studied. The author has confirmed from experiments and theoretically that the particles on the buildup layer in the circular tube are transported in a hopping manner, but the situation of the sedimentary particles should be taken into consideration due to the particles.