Publicou 18 edições por ano
ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561
Indexed in
HOMOTOPY STUDY OF ENTROPY GENERATION IN MAGNETIZED MICROPOLAR FLOW IN A VERTICAL PARALLEL PLATE CHANNEL WITH BUOYANCY EFFECT
RESUMO
The paper presents the results of an analytical investigation into the buoyancy force effects on the entropy generation in magnetohydrodynamic non-Newtonian flow due to constant pressure gradient in a vertical parallel plate channel. The length of the channel plates is assumed to be infinite and uniform, and they are held at different temperatures. The Eringen thermomicropolar material model is used to simulate the rheological flow in the channel. The resulting governing equations are then solved under physically viable boundary conditions at the channel walls, using the Homotopy Analysis Method (HAM). The variations of emerging non-Newtonian and thermophysical parameters, i.e., couple stress parameter (between 1 and 10), Eringen micropolar parameter (0 ≤ c < 1), Reynolds number (between 1 and 5), Grashof number (between 0.1 and 5), Hartmann number (between 0.5 and 2), Brinkman number (between 0.1 and 0.5), and viscous dissipation parameter (between 0 and 1) are considered. The prescribed ranges of the parameters are physically representative of the real non-Newtonian magnetohydrodynamic thermal systems employing micropolar fluids. The computations show that an increasing magnetic field effect reduces the entropy production at the channel walls, whereas the converse behavior is observed for the increasing couple stress parameter, Reynolds number, Grashof number, and the viscous dissipation parameter. The increasing micropolarity parameter and Hartmann number effectively decrease the entropy generation production.
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