We investigate the entropy generation characteristics of a non-Newtonian fluid in a narrow fluidic channel under electrokinetic forcing, taking the effect of conjugate heat transfer into the analysis. We use power-law model to describe the non-Newtonian fluid rheology, in an effort to capture the essential thermohydrodynamics. We solve the conjugate heat transfer problem in an analytical formalism using the thermal boundary conditions of third kind at the outer surface of the walls. We bring out the alteration in the entropy generation behavior as attributable to the rheology-driven alteration in heat transfer, coupled with nonlinear interactions between viscous dissipation and Joule heating originating from electroosmotic effects. We unveil optimum values of different parameters, including both the geometric as well as thermophysical parameters, which lead to the minimization of the entropy generation rate in the system. We believe that the inferences obtained from the present study may bear far ranging consequences in the design of various cooling and heat removal devices/systems, for potential use in microscale thermal management.
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Entropy Generation Minimization in an Electroosmotic Flow of Non-Newtonian Fluid: Effect of Conjugate Heat Transfer
Prakash Goswami,
Prakash Goswami
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
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Pranab Kumar Mondal,
Pranab Kumar Mondal
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India;
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India;
Advanced Technology Development Center,
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
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Anubhab Datta,
Anubhab Datta
Department of Mechanical Engineering,
Jadavpur University,
Kolkata, West Bengal 700032, India
Jadavpur University,
Kolkata, West Bengal 700032, India
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Suman Chakraborty
Suman Chakraborty
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India;
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India;
Advanced Technology Development Center,
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
e-mail: suman@mech.iitkgp.ernet.in
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
e-mail: suman@mech.iitkgp.ernet.in
Search for other works by this author on:
Prakash Goswami
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
Pranab Kumar Mondal
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India;
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India;
Advanced Technology Development Center,
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
Anubhab Datta
Department of Mechanical Engineering,
Jadavpur University,
Kolkata, West Bengal 700032, India
Jadavpur University,
Kolkata, West Bengal 700032, India
Suman Chakraborty
Department of Mechanical Engineering,
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India;
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India;
Advanced Technology Development Center,
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
e-mail: suman@mech.iitkgp.ernet.in
Indian Institute of Technology Kharagpur,
Kharagpur, West Bengal 721302, India
e-mail: suman@mech.iitkgp.ernet.in
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received January 13, 2015; final manuscript received December 22, 2015; published online February 3, 2016. Assoc. Editor: Oronzio Manca.
J. Heat Transfer. May 2016, 138(5): 051704 (9 pages)
Published Online: February 3, 2016
Article history
Received:
January 13, 2015
Revised:
December 22, 2015
Citation
Goswami, P., Mondal, P. K., Datta, A., and Chakraborty, S. (February 3, 2016). "Entropy Generation Minimization in an Electroosmotic Flow of Non-Newtonian Fluid: Effect of Conjugate Heat Transfer." ASME. J. Heat Transfer. May 2016; 138(5): 051704. https://doi.org/10.1115/1.4032431
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