SHRINKING PATTERN AND ELECTRIC POTENTIAL OF MICRO BUBBLES

The shrinking pattern from micro bubble to micro-nano bubble was investigated by a flow visualization system using micro-scope photography. A measuring system of an electric potential of micro bubbles was developed and the value of the electric potential of micro bubbles were measured by using the system. The shrinking motion of micro bubbles is 3 kinematical patterns which associate with jet motion from inside the bubbles. The magnitude of the electric potential value of the micro bubbles is -40 - -100mv from 20 to 30μm in diameter. The potential values of the bubbles which diameters are larger 40μm decrease rapidly.