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Thermal transport in combined pressure - Electroosmotically driven flow in microchannels

Qazizade, A ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1109/ITHERM.2006.1645323
  3. Publisher: 2006
  4. Abstract:
  5. An analytical solution is presented to study the heat transfer characteristics of the combined pressure - electroosmotically driven flow in planar microchannels. The physical model includes the Joule heating effect to predict the convective heat transfer coefficient in two dimensional microchannels. The velocity field, which is a function of external electrical field, electroosmotic mobility, fluid viscosity and the pressure gradient, is obtained by solving the hydrodynamically fully-developed laminar Navier-Stokes equations considering the electrokinetic body force for low wall zeta potentials. Then, assuming a thermally fully-developed flow, the temperature distribution and the Nusselt number is obtained for a constant wall heat flux boundary condition. The fully-developed temperature profile and the Nusselt number depend on velocity field, channel height, solid/liquid interface properties and the imposed wall heat flux. A parametric study is presented to evaluate the significance of various parameters, and in each case the maximum heat transfer rate is obtained. © 2006 IEEE
  6. Keywords:
  7. Channel flow ; Computational methods ; Electric field effects ; Heat transfer coefficients ; Hydrodynamics ; Navier Stokes equations ; Pressure effects ; Electrokinetics ; Joule heating ; Microchannels ; Velocity field ; Electroosmosis
  8. Source: 10th Intersociety Conference on Thermal and Thermomechanical Phenomena and Emerging Technologies in Electronic Systems, ITherm 2006, San Diego, CA, 30 May 2006 through 2 June 2006 ; Volume 2006 , 2006 , Pages 63-70 ; 0780395247 (ISBN); 9780780395244 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/1645323