| Date | 2022.3.29 (16：00 - 17：00) |
|---|---|
| Venue |
Meeting ID:832 2896 7131 Passcode:235107 |
| Speaker | Dr. Claus-Dieter Ohl |
| Affiliation | Otto-von-Guericke University (Germany) |
| Title | "Experiments on Cavitation Nuclei and Nanobubbles" ＜Abstract＞ Pulsed lasers are extremely useful to generate and expand small bubbles in liquids and surfaces. In this seminar I will present two simple experimental systems to explore the nature of nanobubbles. The first utilizes a thin liquid gap sandwiched by two stiff transparent materials, i.e. glass. The laser pulse launches a surface wave in the gap that is able to induce tension of up to he homogenous nucleation threshold. We explore this system and provide a novel way to nucleate bubbles by supersaturating the liquid in the gap locally. In the second experimental system we create by some yet unknown mechanism with a pulsed laser submicron sized bubbles in bulk water. Utilizing a rarefaction wave some time after the pulsed laser demonstrates the successful generation of nanobubbles. Both systems are easy to setup in a lab that has a pulsed laser source. I invite you to join this quest in understanding nanobubbles and their nucleation. |
| Language | English |
| Intended for | Everyone is welcome to join. |
| Co-Organized by | Institute of Global Innovation Research, “LIFE SCIENCE” Tagawa Team Excellent Leader Development for Super Smart Society by New Industry Creation and Diversity |
| Contact | Institute of Global Innovation Research, Institute of Engineering Prof. Yoshiyuki Tagawa Email: tagawayo(at)cc.tuat.ac.jp |
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