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

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<mark>Journal publication date</mark>08/2016
<mark>Journal</mark>Comptes Rendus Mécanique
Issue number8
Volume344
Number of pages9
Pages (from-to)547-555
Publication StatusPublished
Early online date6/05/16
<mark>Original language</mark>English

Abstract

This paper examines the combined effects of the buoyancy force and of the magnetic field on the entropy generation rate in the flow of a couple stress fluid through a porous vertical channel. The flow's dynamical equations were non-dimensionalised and solved via the application of the Adomian decomposition method (ADM). Variations of some thermo-physical parameters were conducted and discussed, with regard to the physics of the fluid. Our result shows that the entropy generation rate increases as the buoyancy increases in the fluid. In addition, the irreversibility in the flow system results mainly from the fluid's viscosity, ohmic heating, and the buoyancy.