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Strategy for active mixing in microdevices.

Boris Stoeber1, Dorian Liepmann, Susan J Muller

  • 1Department of Mechanical Engineering, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4. stoeber@mech.ubc.ca

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|August 7, 2007
PubMed
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We developed an active microfluidic mixer using microvalves for controlled flow deviation. This compact device efficiently mixes fluids via chaotic advection, with adjustable mixing independent of flow rate.

Area of Science:

  • Fluid dynamics
  • Microfluidics
  • Biochemical engineering

Background:

  • Microfluidic devices are crucial for lab-on-a-chip applications.
  • Efficient mixing in microchannels remains a challenge, often requiring complex designs or high flow rates.

Purpose of the Study:

  • To present a novel active microfluidic mixer design.
  • To demonstrate experimental control over mixing efficiency independent of flow rate.

Main Methods:

  • The study presents a concept and experimental validation of an active microfluidic mixer.
  • Microvalves are employed to induce periodic flow deviation.
  • Chaotic advection is utilized by stretching and folding fluid interfaces for mixing.

Main Results:

Related Experiment Videos

  • The active microfluidic mixer design was experimentally demonstrated.
  • The device achieves efficient mixing of different fluids.
  • Mixing degree can be adjusted independently of the flow rate.

Conclusions:

  • The developed active microfluidic mixer offers a compact and efficient solution for fluid mixing.
  • This technology allows for tunable mixing performance in microfluidic systems.
  • The approach using controlled flow deviation and chaotic advection is effective for microscale mixing.