Journal of Materials, Processes and Environment
Volume 4, Numéro 1, Pages 33-36

Entropy Generation In Electrically Conducting Elasto-viscous Fluid In A Porous Medium Over A Stretching Sheet Subject To A Transverse Magnetic Field

Authors : Bentebba Aicha .

Abstract

An analysis is performed for entropy generation in a steady laminar boundary layer flow of an electrically conducting elasto-viscous fluid in a porous medium subject to a transverse uniform magnetic field past a semi-infinite stretching sheet, The effects of viscous dissipation, internal heat generation of absorption and work done due to deformation are considered in the energy equation. The variations in the velocity, temperature field and entropy generation with change in various dimensionless parameters, such as viscoelastic parameter (K), combined parameter (C), Prandtl number (Pr) are presented. It was found that the temperature varies significantly with the Prandtl number and the magnetic parameter and the entropy generation decreases with the increase of the Prandtl number, so the optimum design and efficient performance of the flow system can be enhanced by the ability to clearly identify the source and location of entropy generation.

Keywords

Entropy generation, Magnetic field, Porous medium, Second grade fluid, Stretching sheet.