The oscillation of gas bubbles in tubes: Experimental results

An experimental study is presented of the frequency dependence and damping of the forced volume oscillations of gas bubbles in liquid-filled tubes. Th e bubbles occupy the entire section of the tube and are driven by a needle attached to a loudspeaker cone. The liquids used were water, a water-surfac tant solution, and silicon oil, and the tube diameters were I and 3 mm. The results are in excellent agreement with the theory developed in two earlie r papers. This work is motivated by the possibility of using gas bubbles as actuators in fluid-handling microdevices. (C) 1999 Acoustical Society of A merica. [S0001-4966(99)04807-9].