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A 3D-printed flow distributor with uniform flow rate control for multi-stacked microfluidic systems.

Young-June Park1, Taejong Yu2, Se-Jun Yim3

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Summary

A new microfluidic flow distributor with a fluidic damper effectively prevents uneven flow in scaled-up systems. This 3D-printed device ensures uniform fluid distribution across numerous channels, crucial for applications like drug delivery.

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Area of Science:

  • Chemical Engineering
  • Microfluidics
  • Fluid Dynamics

Background:

  • Scaling up microfluidic systems presents challenges in achieving uniform flow distribution from a single inlet to multiple outlets.
  • Flow maldistribution can significantly impact the efficiency and outcome of microfluidic chemical production and other applications.

Purpose of the Study:

  • To develop and validate a compact flow distributor with an integrated fluidic damper for microfluidic systems.
  • To enable efficient scale-up of microfluidic devices by ensuring equitable fluid flow across numerous channels.

Main Methods:

  • Computational Fluid Dynamics (CFD) was employed to optimize the design of the fluidic damper.
  • A microfluidic flow distributor with 25 exit channels was fabricated using Digital Light Processing (DLP) 3D printing.
  • Experimental validation was conducted to assess the performance of the developed flow distributor.

Main Results:

  • The 3D-printed flow distributor achieved a low maldistribution factor (MF) of 2.2% for 25 exit channels.
  • The device introduced only a minor increase (<6%) in pressure drop, indicating high efficiency.
  • A generalized design manual was proposed and successfully used to design a distributor for 625 microchannels with a MF of 1.2%.

Conclusions:

  • The developed 3D-printed flow distributor with a CFD-optimized fluidic damper effectively addresses flow maldistribution in scaled-up microfluidic systems.
  • The proposed design manual and rapid 3D printing platform facilitate the efficient development of multi-channel micro-devices.
  • This technology is highly relevant for applications demanding precise fluid flow control, such as drug delivery and energy conversion systems.