By the analysis and comparison of the particles of dust flow, the main force acting on the particles of dry dust flow is Van Der Waals force and the liquid-bridging force on the particles of wet dust flow are found.

• 通过时尘流中尘粒受力的分析，得出在乾燥环境下作用在尘粒上的主作用力是范德华力；在湿润情况下作用在尘粒上的主作用力是液桥力的结论。