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Electroosmotic flow of power-law fluids with temperature dependent properties

Babaie, A ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jnnfm.2012.08.005
  3. Publisher: Elsevier , 2012
  4. Abstract:
  5. The influence of variable fluid properties on mixed electroosmotic and pressure driven flow of non-Newtonian fluids is investigated in this paper. The non-linear coupled energy and momentum equations are solved by means of an iterative numerical approach. The results reveal that the temperature dependent effects only become significant at very high values of the Debye-Hückel parameter in case of combined electroosmotic and pressure driven flow and could safely be neglected in other cases. It is observed that the physical properties variation lead to a higher mean velocity in case of pressure assisted flow and a lower mean velocity in case of pressure opposed flow. Furthermore, the temperature dependent effects result in reduction of viscosity and the electrical resistivity over the majority of the channel cross section. It is also found that the shear-thinning fluids are more sensitive to fluid properties variation with temperature compared with Newtonian and shear-thickening fluids
  6. Keywords:
  7. Power-law fluids ; Temperature dependent properties ; Channel cross section ; Electrical resistivity ; Electroosmotic ; Electroosmotic flow ; Energy and momentum equations ; Fluid property ; Mean velocities ; Newtonians ; Non-Newtonian fluids ; Numerical approaches ; Opposed flow ; Power law fluid ; Pressure-driven flows ; Shear thinning fluids ; Shear-thickening fluids ; Temperature-dependent effects ; Temperature-dependent properties ; Variable fluid properties ; Viscous dissipation ; Electric conductivity ; Joule heating ; Non Newtonian liquids ; Viscous flow ; Zeta potential ; Electroosmosis
  8. Source: Journal of Non-Newtonian Fluid Mechanics ; Volume 185-186 , 2012 , Pages 49-57 ; 03770257 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0377025712001474