| Presentation | 2023-05-18 Analysis of acoustic streaming driving force on electronic chip parts levitated in aerial ultrasonic standing waves Yuji Wada, Kentaro Nakamura, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the ultrasonic levitation technology of small chip parts, some parts are difficult to be levitated at frequencies below 40 kHz, but can be levitated at frequencies above 70 kHz. According to the theory of acoustic radiation force, the ratio of holding force to gravity does not decrease as the volume of the object to be levitated decreases, but the acoustic streaming may inhibit levitation. An viscoacoustic analysis was conducted considering the viscous boundary layer, and the fluid pressure of the acoustic flow was calculated by simulating the acoustic streaming via the acoustic flow driving force theory. As a result, the disturbing force due to the acoustic streaming exceeded the holding force as the volume of the floating object decreased. When the dimension of levitated object is less than 20 times the boundary layer thickness, it cannot be lifted regardless of the input sound pressure amplitude. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ultrasonic levitation / acoustic radiation force / acoustic streaming / standing wave / finite element method |
| Paper # | US2023-4 |
| Date of Issue | 2023-05-11 (US) |
| Conference Information | |
| Committee | US |
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| Conference Date | 2023/5/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Surugadai Campus, Nihon University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Nonlinear acoustics, Ultrasonics, etc. |
| Chair | Kentaro Nakamura(Tokyo Inst. of Tech.) |
| Vice Chair | Yoshikazu Koike(Shibaura Inst. of Tech.) / Yasuaki Watanabe(Tokyo Metropolitan Univ.) |
| Secretary | Yoshikazu Koike(Tohoku Univ.) / Yasuaki Watanabe(Chiba Univ.) |
| Assistant | Kan Okubo(Tokyo Metropolitan Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Ultrasonics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Analysis of acoustic streaming driving force on electronic chip parts levitated in aerial ultrasonic standing waves |
| Sub Title (in English) | |
| Keyword(1) | ultrasonic levitation |
| Keyword(2) | acoustic radiation force |
| Keyword(3) | acoustic streaming |
| Keyword(4) | standing wave |
| Keyword(5) | finite element method |
| 1st Author's Name | Yuji Wada |
| 1st Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 2nd Author's Name | Kentaro Nakamura |
| 2nd Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| Date | 2023-05-18 |
| Paper # | US2023-4 |
| Volume (vol) | vol.123 |
| Number (no) | US-36 |
| Page | pp.pp.18-23(US), |
| #Pages | 6 |
| Date of Issue | 2023-05-11 (US) |