Experimental Study on Bubble Velocity Characteristics in Water under Sway Motion

Experimental study of bubble velocity characteristics under sway motion is carried out. An experimental system is designed and manufactured. A fast camera is used to record the behavior of the bubbles. By tracking the path of the bubbles, movement parameters of the bubble are obtained under different motion conditions. It is found that the horizontal velocity, vertical velocity and path of bubbles are all obviously influenced by the inertial force and sloshing of free surface which are both induced by sway motion. The longer the sway motion period is, the greater the peak horizontal velocity is, and the sharper the path is and the shorter the vertical velocity is. Compared with inertial force, sloshing of free surface has a greater impact on the horizontal velocity.