オリフィスから発生する気泡の音波による制御(S25-3 気泡力学に関する基礎解析とその応用(3),S25 気泡力学に関する基礎解析とその応用)

概要

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A new experimental technique to produce single small gas bubbles from an orifice without a bulk liquid flow is developed. Pulsed acoustic wave is exposed to bubbles growing from an orifice. Bubble formation process is recorded by high-speed photography. Under an acoustic field, bubbles are forced to deform to be elongated upward due to high gas momentum blown from the orifice. The upward elongation contributes to lift up the center of mass of bubble, and the bubble is forced to detach from the orifice. The sizes of the detached bubbles are controllable with varying the triggering point of the acoustic wave excitation. Finally, we obtained single small bubbles ranging from about 0.05 mm to 0.2 mm in radius.
社団法人日本機械学会の論文
2004-09-04