Effective mixing of laminar flows at a density interface by an integrated ultrasonic transducer

Linda Johansson; Stefan Johansson; Fredrik Nikolajeff; Sara Thorslund

Effective mixing of laminar flows at a density interface by an integrated ultrasonic transducer

Linda Johansson, Stefan Johansson, Fredrik Nikolajeff, Sara Thorslund

Department of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

Abstract

An acoustic mixer for glass channel microfluidic systems is presented. An acoustic standing wave, perpendicular to the fluid flow, is generated by the excitation of a miniaturized piezoelectric transducer operated around 10 MHz. The mixing occurs at a fluid-fluid density interface due to the acoustic radiation force; an analytical expression is derived to qualitatively describe this phenomenon. Only a density difference in the range of 2-5 % is required to achieve effective peak broadening of a fluorescent sample between sheath flows.

Original language	English
Title of host publication	12th International Conference on Miniaturized Systems for Chemistry and Life Sciences - The Proceedings of MicroTAS 2008 Conference
Publisher	Chemical and Biological Microsystems Society
Pages	80-82
Number of pages	3
Publication status	Published - 2008
Event	12th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2008 - San Diego, CA, United States Duration: 12 Oct 2008 → 16 Oct 2008

Other

Other	12th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2008
Country	United States
City	San Diego, CA
Period	12/10/08 → 16/10/08

Keywords

Acoustic
Density difference
Mixing
Transducer

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Johansson, Linda ; Johansson, Stefan ; Nikolajeff, Fredrik ; Thorslund, Sara. / Effective mixing of laminar flows at a density interface by an integrated ultrasonic transducer. 12th International Conference on Miniaturized Systems for Chemistry and Life Sciences - The Proceedings of MicroTAS 2008 Conference. Chemical and Biological Microsystems Society, 2008. pp. 80-82

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abstract = "An acoustic mixer for glass channel microfluidic systems is presented. An acoustic standing wave, perpendicular to the fluid flow, is generated by the excitation of a miniaturized piezoelectric transducer operated around 10 MHz. The mixing occurs at a fluid-fluid density interface due to the acoustic radiation force; an analytical expression is derived to qualitatively describe this phenomenon. Only a density difference in the range of 2-5 % is required to achieve effective peak broadening of a fluorescent sample between sheath flows.",

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author = "Linda Johansson and Stefan Johansson and Fredrik Nikolajeff and Sara Thorslund",

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booktitle = "12th International Conference on Miniaturized Systems for Chemistry and Life Sciences - The Proceedings of MicroTAS 2008 Conference",

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Johansson, L, Johansson, S, Nikolajeff, F & Thorslund, S 2008, Effective mixing of laminar flows at a density interface by an integrated ultrasonic transducer. in 12th International Conference on Miniaturized Systems for Chemistry and Life Sciences - The Proceedings of MicroTAS 2008 Conference. Chemical and Biological Microsystems Society, pp. 80-82, 12th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2008, San Diego, CA, United States, 12/10/08.

Effective mixing of laminar flows at a density interface by an integrated ultrasonic transducer. / Johansson, Linda; Johansson, Stefan; Nikolajeff, Fredrik; Thorslund, Sara.

12th International Conference on Miniaturized Systems for Chemistry and Life Sciences - The Proceedings of MicroTAS 2008 Conference. Chemical and Biological Microsystems Society, 2008. p. 80-82.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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AU - Nikolajeff, Fredrik

AU - Thorslund, Sara

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N2 - An acoustic mixer for glass channel microfluidic systems is presented. An acoustic standing wave, perpendicular to the fluid flow, is generated by the excitation of a miniaturized piezoelectric transducer operated around 10 MHz. The mixing occurs at a fluid-fluid density interface due to the acoustic radiation force; an analytical expression is derived to qualitatively describe this phenomenon. Only a density difference in the range of 2-5 % is required to achieve effective peak broadening of a fluorescent sample between sheath flows.

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