Lattice Boltzmann simulation of thermal electro-osmotic flows in micro/nanochannels

Yong Shi, T. S. Zhao, Z. L. Guo

Research output: Journal PublicationArticlepeer-review

11 Citations (Scopus)

Abstract

Electro-osmotic flows in micro/nanochannels usually present a temperature gradient arising from internal Joule heating and viscous dissipation. In this paper, we propose a lattice Boltzmann BGK (LBGK) model for heat transfer in micro/nanoscale electro-osmotic flows. The proposed model was validated by simulation of the constant-property electro-osmotic flow under both isothermal and thermal conditions; the numerical results are in good agreement with analytical solutions. We applied the LBGK model to simulation of the mixed electro-osmotic/ pressure-driven flow and heat transfer with temperature-dependent fluid properties and found that Joule heating exerts a significant effect on electro-osmotic flows and the effect of viscous dissipation becomes significant as the dimension of channel reduces to the nanometer scale.

Original languageEnglish
Pages (from-to)236-246
Number of pages11
JournalJournal of Computational and Theoretical Nanoscience
Volume5
Issue number2
DOIs
Publication statusPublished - Feb 2008
Externally publishedYes

Keywords

  • Electro-osmotic flows
  • Lattice Boltzmann method
  • Microfluidics
  • Viscous dissipation

ASJC Scopus subject areas

  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics
  • Computational Mathematics
  • Electrical and Electronic Engineering

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