Abstract
In order to reduce the amount of chemical solvent used in the washing process, the non-chemical washing technology with micro-bubble is required. In the present study, we focus on the micro-bubble generator with a venturi tube. To clarify washing effect by the micro-bubble generator, washing experiment with cutting oil, grease and oil paint are conducted. As a result, the behavior of bubbles separating from the washing target with oil was visualized through the high speed video camera in detail. Additionally, the relation between the oil detachment rate and the pressure on the washing surface suggested that the pressure wave and micro-bubble from the bubble breakup are the advantage of this washing technology.
