Abstract
This paper describes evaluation of characteristics of air bubbles in micro channel. Micro channels for generation and separation bubbles ware designed and fabricated. Air bubbles about 50μm in diameter were generated repeatedly ,and trapped with micro channel to separate from the water. Air bubbles and flow around bubbles ware visualized using micro-PIV. Removal characteristic of bubbles ware evaluated by Reynolds number and Weber number. Scale effect was appeared while decreasing diameter of bubbles. Bubble energy for unit volume was proposed as the quantity to evaluate the adhesion bubbles and separate from the wall.
