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Joule heating in electrokinetic flow.

Xiangchun Xuan1

  • 1Department of Mechanical Engineering, Clemson University, Clemson, SC 29634, USA. xcxuan@clemson.edu

Electrophoresis
|December 7, 2007
PubMed
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Joule heating in electrokinetic flow causes temperature variations, affecting microfluidic device performance. This review covers recent advances in understanding and mitigating these effects on fluid mechanics and heat/mass transfer.

Area of Science:

  • Microfluidics
  • Electrokinetics
  • Heat and Mass Transfer

Background:

  • Electrokinetic flow offers advantages for lab-on-a-chip devices.
  • Joule heating is an inherent issue in electrokinetic flow, causing temperature variations.
  • These temperature variations impact electric, flow, and concentration fields due to temperature-dependent properties.

Purpose of the Study:

  • To review recent progress on Joule heating in electrokinetic flow.
  • To highlight theoretical and experimental advancements in fluid mechanics and heat/mass transfer.
  • To focus on temperature-induced flow variations and associated phenomena in microfluidic channels.

Main Methods:

  • Review of theoretical studies on Joule heating effects.
  • Analysis of experimental investigations into electrokinetic flow phenomena.

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  • Examination of fluid mechanics and heat/mass transfer principles.

    • Main Results:

    • Joule heating significantly affects throughput and resolution in microfluidic analyses.
    • Temperature variations induce disturbances in electric, flow, and concentration fields.
    • Understanding these effects is crucial for optimizing microfluidic device performance.

    Conclusions:

    • Joule heating is a critical factor in electrokinetic microfluidic systems.
    • Further research is needed to fully comprehend and manage temperature-induced effects.
    • Mitigating Joule heating is essential for advancing lab-on-a-chip technologies.