| Presentation | 2003/11/21 Control of microfluidic streaming generated in a strongly focused ultrasound beam. Kazuhisa MATSUDA, Yoko SUZUKI, Tomoo KAMAKURA, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Control of micrometer-scaled acoustic streaming is expected to provide a promising method in microfluidic technology. However, there are less research reports on such acoustic systems to control the streaming velocity. To make sure that the velocity depends strongly on sound field distribution we carry out some experiments using a focusing ultrasound source with a double pressure peak near the focus. The source consists of two concentric concave transducers; one is an inner disc type piezoelectric element and the other an outer ring type element. Both the elements were driven with the same frequency but reversed polarity. The sound beam model equation, SEE [T. Kamakura et al, J. Acoust. Soc. Am 105, 3083-3086 (1999).], is successfully employed to predict the focused pressure distribution. The external driving force to act on the fluid is readily calculated by the sound pressure, and then the streaming velocity can be theoretically predicted by the Navier-Stokes equation with the term of the force. The axial velocity profile is measured using Laser Doppler Velocimetry. It has been confirmed that the experimental data and theoretical prediction are in pretty good agreement. The control feasibility of microfluidic streaming is discussed by scaling down the ultrasound source. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Focused Ultrasound Beam / Microfluidic Streaming / SEE / Nonlinear Acoustics |
| Paper # | US2003-79 |
| Date of Issue |
| Conference Information | |
| Committee | US |
|---|---|
| Conference Date | 2003/11/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Ultrasonics (US) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Control of microfluidic streaming generated in a strongly focused ultrasound beam. |
| Sub Title (in English) | |
| Keyword(1) | Focused Ultrasound Beam |
| Keyword(2) | Microfluidic Streaming |
| Keyword(3) | SEE |
| Keyword(4) | Nonlinear Acoustics |
| 1st Author's Name | Kazuhisa MATSUDA |
| 1st Author's Affiliation | The Koganei Technical High School() |
| 2nd Author's Name | Yoko SUZUKI |
| 2nd Author's Affiliation | The University of Electro-Communications |
| 3rd Author's Name | Tomoo KAMAKURA |
| 3rd Author's Affiliation | The University of Electro-Communications |
| Date | 2003/11/21 |
| Paper # | US2003-79 |
| Volume (vol) | vol.103 |
| Number (no) | 485 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |