Abstract
We have developed the Pressure-Oscillating Defoaming for removing air bubbles from shear-thinning fluids.When there are two air bubbles,the under-bubble rises earlier than the upper air bubble.In the fluid between air bubbles,hydrodynamic interaction occurs and there is a complicated flow.We installed air bubbles in the ink sheet,traced the motion of the ink,and analyzed the flow.The flow between 2 air bubbles was analyzed using the inked racer method.It turns out that the tracer particle with bottom air bubbles is movmg from the tracer particle of upper air bubbles,and the complicated flow has occured near the bottom air bubbles.
