Analysis of the Magnetic Field Effect on Entropy Generation at Thermosolutal Convection in a Square Cavity

Abstract

Thermosolutal convection in a square cavity filled with air and submitted to an inclined magnetic field is investigated numerically. The cavity is heated and cooled along the active walls with a mass gradient whereas the two other walls of the cavity are adiabatic and insulated. Entropy generation due to heat and mass transfer, fluid friction and magnetic effect has been determined in transient state for laminar flow by solving numerically the continuity, momentum energy and mass balance equations, using a Control Volume Finite-Element Method. The structure of the studied flows depends on four dimensionless parameters which are the Grashof number, the buoyancy ratio, the Hartman number and the inclination angle. The results show that the magnetic field parameter has a retarding effect on the flow in the cavity and this lead to a decrease of entropy generation, Temperature and concentration decrease with increasing value of the magnetic field parameter.

Natural convection in rhombic enclosures with isothermally heated side or bottom wall: Entropy generation analysis

“…They found that the structure of the flows inside the cavity depends on four dimensionless parameters such as thermal Grashof number, the inclination angle, the irreversibility distribution ratio and the aspect ratio of the cavity. Further, the effect of the magnetic field on the entropy generation with the thermosolutal convection [23] and the discrete heater at the vertical wall of the cavity [24] is also reported. Current work focuses on the analysis of the entropy generation during natural convection in rhombic enclosures based on inclination angles to meet the requirement of various industrial applications involving the electronic cooling, solar heating, etc.…”

Analysis of thermosolutal natural convection and entropy generation within a three-dimensional inclined cavity with various aspect ratios

“…in the present work and denote irreversibility distribution ratios related to velocity gradients, concentration gradients, and mixed product of concentration and thermal gradients, respectively (Magherbi et al 2006;Bouabid et al 2011;Ghachem et al 2012).…”

Effect of a Magnetic Quadrupole Field on Entropy Generation in Thermomagnetic Convection of Paramagnetic Fluid with and without a Gravitational Field

“…Jery et al [31] numerically investigated the influence of an inclination angle of the magnetic field on entropy generation in natural convection for air and liquid gallium. Bouabid et al [32] studied the thermosolutal convection in a square cavity filled with a binary gas mixture under an inclined magnetic field. It was found that the magnetic field induced the decrease of entropy generation.…”