0

Full Content is available to subscribers

Subscribe/Learn More  >

Analysis of Fluid Flow and Heat Transfer in Microchannels Using Combined Pressure Gradient and Electroosmotic Pumping

[+] Author Affiliations
Reza Monazami, Azad Q. Zade, Mehrdad T. Manazari

Sharif University of Technology, Tehran, Iran

Paper No. ICMM2005-75160, pp. 503-510; 8 pages
doi:10.1115/ICMM2005-75160
From:
  • ASME 3rd International Conference on Microchannels and Minichannels
  • ASME 3rd International Conference on Microchannels and Minichannels, Parts A and B
  • Toronto, Ontario, Canada, June 13–15, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4185-5 | eISBN: 0-7918-3758-0
  • Copyright © 2005 by ASME

abstract

A numerical model has been developed for studying the flow and heat transfer characteristics of single phase liquid flow through a microchannel. In this work the heat transfer characteristics of pressure driven and electroosmotic flow through microchannels have been studied. The governing equations are the Poisson-Boltzmann and Navier-Stokes equations which have been solved numerically using the standard Galerkin and the Mixed 4-1 finite element methods, respectively. Finally the energy equation is solved numerically using the Stream-wise Upwind Petrov Galerkin (SUPG) method. Two dimensional Poisson-Boltzmann equation was first solved to find the electric potential field and net charge distribution in the microchannel. Considering the electrokinetic body forces due to interaction of an external electric field on the charged fluid elements, two dimensional Navier-Stokes equations were solved to obtain the flow field in the microchannel for a combined pressure driven-electroosmotic flow. Local and averaged heat transfer coefficients were calculated for constant wall temperature condition. The results were compared to those of pressure driven flow in the same geometry without using electroosmotic pumping. Comparisons revealed significant changes in the velocity profile and heat transfer characteristics through the channel. It was observed that the convective heat transfer rate was increased due to sharp velocity gradients in the vicinity of the microchannel walls. The influence of various effective parameters including external electric field strength and ionic concentration was also studied. It was seen that aforementioned parameters strongly affect the heat transfer rate and flow pattern through the microchannel.

Copyright © 2005 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In