Second law analysis for hydromagnetic couple stress fluid flow through a porous channel

• Published in: Alexandria engineering journal Vol. 55; no. 2; pp. 925 - 931
• Main Authors: Kareem, S.O., Adesanya, S.O., Vincent, U.E.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-06-2016; Elsevier
• Subjects: ADM; Entropy generation; Irreversibility ratio; Magnetic field; Ohmic heating; Slip flow; Slip flow; Irreversibility ratio; ADM; Ohmic heating; Magnetic field; Entropy generation
• ISSN: 1110-0168
• DOI: 10.1016/j.aej.2016.02.020

In this work, the combined effects of magnetic field and ohmic heating on the entropy generation rate in the flow of couple stress fluid through a porous channel are investigated. The equations governing the fluid flow are formulated, non-dimensionalised and solved using a rapidly convergent semi-analytical Adomian decomposition method (ADM). The result of the computation shows a significant dependence of fluid’s thermophysical parameters on Joule’s dissipation as well as decline in the rate of change of fluid momentum due to the interplay between Lorentz and viscous forces. Moreover, the rate of entropy generation in the flow system drops as the magnitude of the magnetic field increases.