The Study On Effects Of Rotational Coriolis Force Upon Solid Particles Movement In Small-scale Rotational Multiphase Flow

It is one of the most important subjects for hydraulic engineering to protect sediment going into ditch of irrigation or electric power generation. Curving are utilized by the archaical Dujiangyan, the modern curved basins silting, funnel silting, sediment trapping vortex tube and so on to produce swirl Two-Phase flow, and water-sediment separated by the movement character in the swirl flow field. Current studies on water-sediment separation consider the effects of rotational Coriolis force upon sediment movement could be ignored,Therefore, only few researcher have studied the effects of rotational Coriolis force upon sediment movement. In this paper,assumptions were proposed based on physical model experiment.In this experiment, according to the stress characteristics of particles in two-phase flow, the particles were choosed for the further study in both the horizontal and the vertical investigations,the movement of the particles were photographically recorded and narrated by the high-speed camera.The results shows the existence of the Coriolis force in small-scale rotational multiphase flow and it could not be ignored upon sediment movement.Then according to the theories of solid mechanics, mechanical analysis were presented for the particles in two-phase flow on both the horizontal and the vertical experiments and some results were presented. According to the experimental data, we could correctly determinate the Coriolis force and the relation between it and other forces.we also could unambiguously get under which conditions the Coriolis force could not be ignored upon sediment movement and under which conditions it could.It is supplement for geostrophic Coriolis force and ,and it also a complementary for the assumption that the Coriolis force could not be ignored upon sediment movement. This will be a reference to particle motion of small-scale mutltiphase.