2 0 0 0 OA 超音波の音響定在波中の浮遊物体挙動に関する研究
- 著者
- 青木 一義
- 巻号頁・発行日
- 2011
筑波大学博士 (工学) 学位論文・平成23年3月25日授与 (甲第5699号)
1 0 0 0 OA 音響定在波中の浮遊液滴に働く物体保持力に関する研究
- 著者
- 阿部 豊 青木 一義
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- 日本機械学会論文集 B編 (ISSN:03875016)
- 巻号頁・発行日
- vol.71, no.712, pp.2864-2869, 2005-12-25 (Released:2011-03-03)
- 参考文献数
- 10
- 被引用文献数
- 3
It is expected to manufacture new materials under the micro-gravity environment in space. Under the micro-gravity environment, holding technology of molten metal is important to manufacture new materials. There are previous studies about droplet levitation by the acoustic wave for the holding technology. However it is still unknown experimentally and analytically how the acoustic wave act on the levitated droplet. In the present study, the technology to handle the material in space by the ultrasonic wave is developed and the simulation technique to evaluate the acoustic wave field and the movement of the droplet in the acoustic field. Therefore the followings are the purposes of present study. At first, the characteristics of droplets holding by the ultrasonic standing wave under normal gravity environment and micro-gravity environment is investigated. Secondary, numerical simulation is conducted to clarity the characteristics of ultrasonic standing wave. Finally, the force committed to a droplet is investigated by reproducing a movement of the droplet.
1 0 0 0 OA 超音波を用いた浮遊液滴制御に関する研究
- 著者
- 阿部 豊 青木 一義
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- 日本機械学会論文集 B編 (ISSN:03875016)
- 巻号頁・発行日
- vol.70, no.692, pp.1072-1077, 2004-04-25 (Released:2011-03-03)
- 参考文献数
- 4
- 被引用文献数
- 1 4
It is expected to manufacture new materials under the micro-gravity environment. Under the micro-gravity environment, holding technology of molten metal is important to manufacture new materials. In the present study, the technology to handle the material in space by the ultrasonic wave is developed. However, it is difficult to hold a high temperature object by ultrasonic standing wave due to temperature gradient. Moreover, it is also important to measure the physical properties of the material by non-contacting. Therefore the followings are the purposes of present study. At first, the characteristics of droplets holding by the ultrasonic standing wave under normal gravity environment is investigated. Secondly, the surface tension of the droplet is estimated by measuring surface oscillation. Thirdly, the viscous coefficient of liquid droplet is calculated by the damping constant of the droplet. Finally, numerical calculation is conducted to clarity the characteristics of the high temperature object holding in space.