Generation of single bubbles of various sizes using a slitting elastic tube

The generation of single bubbles is often required in laboratory research. However, it is very difficult to control bubble production, especially for a required bubble size, by using the same orifice. In this study, we demonstrate the control of bubble formation by combining a pulsed acoustic pressure wave in a gas phase and a slitting elastic tube. By elastically deforming the tube using the acoustic wave, we can control the bubble radius in the range from 300 μm to 5 mm by using the same tube without liquid flow. This method can produce bubbles with good repeatability and small individual differences in the tubes.