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Related Experiment Video

Updated: May 30, 2026

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique
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Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

Published on: June 12, 2015

Anomalous mixing behaviour in rotationally actuated microfluidic devices.

Debapriya Chakraborty1, Marc Madou, Suman Chakraborty

  • 1Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur, India, 721302.

Lab on a Chip
|July 22, 2011
PubMed
Summary

This study explores two-fluid mixing in T-shaped microchannels on rotating platforms, identifying three distinct mixing regimes: diffusion-based, Coriolis force-based, and instability-based, with good agreement between theory and experiments.

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Area of Science:

  • Fluid dynamics
  • Microfluidics
  • Rotational mechanics

Background:

  • Two-fluid mixing is crucial for various applications.
  • Microfluidic devices offer precise control over fluid behavior.
  • Rotating platforms can enhance mixing efficiency through Coriolis forces and instabilities.

Purpose of the Study:

  • To analyze the characteristics of two-fluid mixing in T-shaped microchannels on rotating platforms.
  • To identify and characterize different mixing regimes based on rotation speed.
  • To investigate the influence of Coriolis forces and flow instabilities on mixing.

Main Methods:

  • Experimental analysis of two-fluid flow in T-shaped microchannels.
  • Implementation on a rotating platform (Lab-on-a-Compact-Disk framework).

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Microfluidic Mixers for Studying Protein Folding
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Microfluidic Mixers for Studying Protein Folding

Published on: April 10, 2012

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Last Updated: May 30, 2026

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique
10:12

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

Published on: June 12, 2015

Microfluidic Mixers for Studying Protein Folding
12:42

Microfluidic Mixers for Studying Protein Folding

Published on: April 10, 2012

  • Theoretical calculations and scaling analysis to explain observed phenomena.

    • Main Results:

    • Three distinct mixing regimes were identified: diffusion-based (low speeds), Coriolis force-based (intermediate speeds), and instability-based (high speeds).
    • Coriolis forces introduce nontrivial mixing aspects at intermediate speeds.
    • Flow instabilities at high speeds lead to rapid mixing near the junction.

    Conclusions:

    • The study successfully characterized three mixing regimes in microchannels on rotating platforms.
    • Rotation speed is a critical parameter for controlling mixing efficiency.
    • Theoretical models align well with experimental observations, validating the understanding of mixing mechanisms.