Second-Law Analysis for Buoyancy-Driven Hydromagnetic Couple Stress Fluid Flow through a Porous Channel
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Date
2016
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ELSEVIER Comptes Rendus Mecanique
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 thermophysical 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.
Description
Keywords
Magnetic field, Buoyancy force, Entropy generation, Slip flow, Irreversibility ratio, ADM