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

Linda Johansson, Stefan Johansson, Fredrik Nikolajeff, Sara Thorslund

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-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 languageEnglish
Title of host publication12th International Conference on Miniaturized Systems for Chemistry and Life Sciences - The Proceedings of MicroTAS 2008 Conference
PublisherChemical and Biological Microsystems Society
Pages80-82
Number of pages3
Publication statusPublished - 2008
Event12th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2008 - San Diego, CA, United States
Duration: 12 Oct 200816 Oct 2008

Other

Other12th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2008
CountryUnited States
CitySan Diego, CA
Period12/10/0816/10/08

Keywords

  • Acoustic
  • Density difference
  • Mixing
  • Transducer

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