Thermally developing electroosmotically generated flow of two viscoelastic fluids, namely the PTT and FENE-P models, through a slit microchannel is considered. Both the viscous dissipation and Joule heating effects are taken into account and a step change in wall temperature is considered to represent physically conceivable thermal entrance conditions. Expressions for the dimensionless temperature and Nusselt number in the form of infinite series are presented. In general, the resultant eigenvalue problem is solved numerically; nevertheless, an analytical solution is presented for the regions close to the entrance. A parametric study reveals that increasing amounts of the Peclet number result in higher wall heat fluxes. The results also indicate higher wall heat fluxes for non-Newtonian fluids in comparison with Newtonian fluids and the difference is increased with increasing the level of elasticity. Furthermore, based on the value of the dimensionless Joule heating parameter, the Nusselt number may be either an increasing or a decreasing function of the axial coordinate or even both of them in the presence of a singularity point. The viscous heating effects are also found to be negligible.
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Electroosmotic Flow of Viscoelastic Fluids Through a Slit Microchannel With a Step Change in Wall Temperature
Arman Sadeghi,
e-mail: armansadeghi@mech.sharif.edu
Arman Sadeghi
Center of Excellence in Energy Conversion (CEEC)
,School of Mechanical Engineering
,Sharif University of Technology
,P.O. Box 11155-9567
,Tehran
, Iran
e-mail: armansadeghi@mech.sharif.edu
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Hadi Veisi,
e-mail: hadiveisi.sut@gmail.com
Hadi Veisi
Department of Chemical and
Petroleum Engineering
,Sharif University of Technology
,P.O. Box 11365-9465
,Tehran
, Iran
e-mail: hadiveisi.sut@gmail.com
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Mohammad Hassan Saidi,
Mohammad Hassan Saidi
1
e-mail: saman@sharif.edu
1 Corresponding author.
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Ali Asghar Mozafari
Ali Asghar Mozafari
e-mail: mozafari@sharif.edu
Center of Excellence in Energy Conversion (CEEC)
,School of Mechanical Engineering
,Sharif University of Technology
,P.O. Box 11155-9567
,Tehran
, Iran
Search for other works by this author on:
Arman Sadeghi
Center of Excellence in Energy Conversion (CEEC)
,School of Mechanical Engineering
,Sharif University of Technology
,P.O. Box 11155-9567
,Tehran
, Iran
e-mail: armansadeghi@mech.sharif.edu
Hadi Veisi
Department of Chemical and
Petroleum Engineering
,Sharif University of Technology
,P.O. Box 11365-9465
,Tehran
, Iran
e-mail: hadiveisi.sut@gmail.com
Mohammad Hassan Saidi
e-mail: saman@sharif.edu
Ali Asghar Mozafari
e-mail: mozafari@sharif.edu
Center of Excellence in Energy Conversion (CEEC)
,School of Mechanical Engineering
,Sharif University of Technology
,P.O. Box 11155-9567
,Tehran
, Iran
1 Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received November 12, 2011; final manuscript received July 27, 2012; published online January 9, 2013. Assoc. Editor: Andrey Kuznetsov.
J. Heat Transfer. Feb 2013, 135(2): 021706 (12 pages)
Published Online: January 9, 2013
Article history
Received:
November 12, 2011
Revision Received:
July 27, 2012
Citation
Sadeghi, A., Veisi, H., Hassan Saidi, M., and Asghar Mozafari, A. (January 9, 2013). "Electroosmotic Flow of Viscoelastic Fluids Through a Slit Microchannel With a Step Change in Wall Temperature." ASME. J. Heat Transfer. February 2013; 135(2): 021706. https://doi.org/10.1115/1.4007414
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