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A system for micro/nano fluidic flow diagnostics.

Pulak Nath1, Shuvo Roy, Terrence Conlisk

  • 1Department of Biomedical Engineering (ND 20), The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195. USA. nathp@ccf.org

Biomedical Microdevices
|September 1, 2005
PubMed
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This study presents a novel system for measuring fluid flow rates in micro/nano fluidic devices. The developed method accurately quanties flow in noncircular channels using a finite difference approximation, crucial for microfluidics research.

Area of Science:

  • Fluid Dynamics
  • Microfluidics
  • Nanofluidics

Background:

  • Accurate flow rate measurement is critical for micro/nano fluidic systems.
  • Traditional methods may not be suitable for non-circular micro/nano channels.
  • Developing reliable flow measurement techniques is essential for advancing microfluidic applications.

Purpose of the Study:

  • To present a novel system for flow measurement in micro/nano fluidic components.
  • To validate a finite difference approximation method for calculating flow rates.
  • To investigate flow characteristics in microchannels and nanochannels with noncircular cross-sections.

Main Methods:

  • Utilized microfabricated arrays of straight channels with noncircular cross-sections.
  • Employed a pneumatic pumping system to control pressure drop.

Related Experiment Videos

  • Measured flow rates using a sensitive balance and calculated them via finite difference approximation.
  • Validated the experimental setup with long narrow circular tubes.

    • Main Results:

    • Investigated trapezoidal microchannels (6.5 microm deep) with flow rates of 27.7-119.4 micro L/min.
    • Studied arc-shaped nanochannels (600 nm deep) with flow rates of 0.29-0.99 micro L/min.
    • Calculated flow rates showed good agreement with experimental data (within 5.5% for microchannels, 19.68% for nanochannels).

    Conclusions:

    • The developed system and finite difference method are effective for flow measurement in micro/nano fluidic channels.
    • The study provides valuable data on flow behavior in noncircular micro and nanochannels.
    • This work contributes to the advancement of precise fluid control in micro/nano scale devices.