Numerical Investigation of Electroosmotic Flow in Microchannels

Mushtaq Ismael Hasan; Alaa Mohammed Lafta; Ahmed Jassim Shkarah

doi:10.15866/ireme.v11i8.11988

Numerical Investigation of Electroosmotic Flow in Microchannels

Mushtaq Ismael Hasan^(1*), Alaa Mohammed Lafta⁽²⁾, Ahmed Jassim Shkarah⁽³⁾

^(*) Corresponding author

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DOI: https://doi.org/10.15866/ireme.v11i8.11988

Abstract

Electrokinetic micropumps receive increasing attention due to their applications in pumping of biological and chemical fluids; such as blood, DNA, and saline PBSs. In this paper, the electroosmotic flow in square microchannels has been numerically investigated by developing a model from the basic governing equations (continuity, momentum, energy, Laplace and Poisson- Boltzmann equations). These equations were numerically solved by CFD program for two fluids (water and PBS). The study considered the external applied electric field and zeta potential to interrogate their potential effects on electroosmotic flow. Thermal characteristics of electroosmotic flow have been also studied by calculating the temperature distribution through electroosmosis micropump region. The results confirm the considerable effect of applied electric field, concentration of electrolyte fluid and zeta potential on microflow velocity and flow rate. The PBS gave higher velocity and flow rate values compared with water, and there was only a slight increase in temperature due to Joule heating effect.
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Keywords

Microchannel; Micropump; Numerical Investigation; Electrokinetic Flow

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