Heat irreversibiility analysis for a couple stress fluid flow in an inclined channel with isothermal boundaries

•The velocity of the non-Newtonian fluid inclined channel decreases with increasing values of the couple stress parameter while the temperature rises.•Entropy generation rate and Bejan number decreases at different rates with small andlarge couple stress parameter. Entropy generation in a fully deve...

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Bibliographic Details
Published inJournal of the Taiwan Institute of Chemical Engineers Vol. 101; pp. 251 - 258
Main Authors Adesanya, Samuel O., Souayeh, Basma, Rahimi-Gorji, Mohammad, Khan, M.N., Adeyemi, O.G.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.08.2019
Subjects
Couple stresses
Inclined channel
Isothermal heating
Second law
Second law
Isothermal heating
Inclined channel
Couple stresses
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Summary:•The velocity of the non-Newtonian fluid inclined channel decreases with increasing values of the couple stress parameter while the temperature rises.•Entropy generation rate and Bejan number decreases at different rates with small andlarge couple stress parameter. Entropy generation in a fully developed couple stress fluid flow through an inclined channel is the focus of the present article. The steady flow of the non-Newtonian fluid via the inclined channel is assumed to be heated isothermally at the boundaries. The formulation of both the fluid flow and heat are based on hydrodynamics and thermodynamics laws. Exact solutions are constructed the dimensionless governing equations. The accuracy of the two solutions are established by direct comparison with the limiting case previously obtained in the current literature. Solution profiles are also presented to demonstrate the effect of variations in the parameter values followed closely by extensive discussions.
ISSN:1876-1070
1876-1089
DOI:10.1016/j.jtice.2019.04.052