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Quantifying Mixing using Magnetic Resonance Imaging
07:33

Quantifying Mixing using Magnetic Resonance Imaging

Published on: January 25, 2012

Quantifying mixing using magnetic resonance imaging.

Emilio J Tozzi1, Kathryn L McCarthy, Lori A Bacca

  • 1Dept. Food Science and Technology, University of California, Davis, USA.

Journal of Visualized Experiments : Jove
|February 9, 2012
PubMed
Summary

This study demonstrates a novel split-and-recombine static mixer for efficiently blending viscous liquids. Magnetic Resonance Imaging (MRI) visualizes real-time distributive mixing, showing uniform dispersion for applications like personal care products.

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Area of Science:

  • Chemical Engineering
  • Fluid Dynamics
  • Materials Science

Background:

  • Mixing is crucial for creating homogeneous mixtures in various industrial processes.
  • Viscous liquid mixing presents challenges due to high resistance to flow and diffusion.
  • Static mixers offer a continuous and efficient method for fluid blending.

Purpose of the Study:

  • To design and prototype a split-and-recombine (SAR) static mixer for viscous fluids.
  • To visualize and analyze the real-time mixing process using Magnetic Resonance Imaging (MRI).
  • To evaluate the effectiveness of the SAR mixer in achieving uniform dispersion.

Main Methods:

  • Construction of a prototype SAR mixer using laser-cut Poly(methyl methacrylate) (PMMA) plates.
  • Utilizing non-Newtonian fluids (Carbopol) and a tracer fluid for mixing experiments.
  • Employing Magnetic Resonance Imaging (MRI) to spatially resolve component concentrations during mixing.

Main Results:

  • The SAR mixer effectively splits and recombines fluid streams, creating an increasing number of layers.
  • MRI visualization confirmed uniform dispersion of the tracer fluid throughout the mixer.
  • The device demonstrated efficient distributive mixing of highly viscous liquids.

Conclusions:

  • The developed SAR static mixer is a viable technology for efficient viscous fluid mixing.
  • MRI is a powerful tool for real-time process monitoring and characterization of mixing.
  • This technology has potential applications in industries such as personal care product manufacturing.