Hokkaido University Research Profiles

Japanese

Liquid atomization granulation: 1

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  • Liquid Atomization Technology Using Ultrasound and Microbubbles

    Toward active control of the amount of liquid atomization

    When ultrasonic waves are irradiated from the liquid to the liquid surface, atomization of the liquid occurs at the liquid surface. In recent years, it has become clear that microbubbles near the liquid surface are responsible for this phenomenon. We are aiming to control the amount of liquid atomization by ultrasound.

    Research

    When ultrasonic waves are emitted from inside a liquid to the surface, the liquid is atomized. The atomized liquid becomes small droplets with a diameter of several micrometers. This liquid atomization technology can produce uniform fine droplets in an energy saving manner and is still widely used in our daily life. Although the mechanism of liquid atomization is still not completely understood, based on our previous research, it has become clear that microbubbles in the vicinity of the liquid surface promote atomization. In this study, we focus on the number of microbubbles in a liquid and aim to control the amount of liquid atomization by ultrasound. By adjusting the number of microbubbles appropriately, we aim to atomize liquids that could not be atomized by ultrasound and to further increase the amount of liquid atomization.

    Kazumichi Kobayashi Associate Professor