The hydrodynamic structure near the interface of a moving bubble in existing of ultrafine particles

摘要

By the use of two dimensional laser Doppler anemometer, the flow field properties near the interface of a moving bubble were determined when particles exist in liquid. The results show that the velocity field had been obvious changed when particles exist. Both tangential and normal velocities decreased in frontal area of the bubble when particles are added. The trend of velocity change is the same. But in tail-vortex area, the tangential velocities decrease greatly with a constant trend. Normal velocities increase gradually from center to fringe with the opposite trend to that of no particles.