Impacts of Uniform Magnetic Field and Internal Heated Vertical Plate on Ferrofluid Free Convection and Entropy Generation in a Square Chamber

Abstract

The heat transfer enhancement and fluid flow control in engineering systems can be achieved by addition of ferric oxide nanoparticles of small concentration under magnetic impact. To increase the technical system life cycle, the entropy generation minimization technique can be employed. The present research deals with numerical simulation of magnetohydrodynamic thermal convection and entropy production in a ferrofluid chamber under the impact of an internal vertical hot sheet. The formulated governing equations have been worked out by the in-house program based on the finite volume technique. Influence of the Hartmann number, Lorentz force tilted angle, nanoadditives concentration, dimensionless temperature difference, and non-uniform heating parameter on circulation structures, temperature patterns, and entropy production has been scrutinized. It has been revealed that a transition from the isothermal plate to the non-uniformly warmed sheet illustrates a rise of the average entropy generation rate, while the average Nusselt number can be decreased weakly. A diminution of the mean entropy production strength can be achieved by an optimal selection of the Lorentz force tilted angle.

The baffle shape effects on natural convection heat transfer in nanofluid-filled permeable container with magnetic field

“…Finally, GFEM was invented to solve the abovementioned fundamental equations (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) and suitable boundary conditions (20)(21)(22). The Galerkin weighted residual approach was utilized to transform these fundamental equations into integral equations.…”

“…Their outcomes showed that heat transmission was affected by the magnetic intensity in a nonmonotonic manner. Sivaraj et al [20] digitally assessed the performance of a magnetic intensity on the convective flow of a ferrofluid in a chamber containing a vertical heated sheet. Outcomes showed that the rate of entropy generation witnessed a rise when an isothermal lamina was replaced by a non-uniformly warmed one, while it was reduced when an ideal inclined Lorentz force was set.…”

The baffle shape effects on natural convection flow and entropy generation in a nanofluid-filled permeable container with a magnetic field

“…Their outcomes showed that heat transmission was affected by the magnetic intensity in a non-monotonic manner. Sivaraj et al 18 digitally assessed the performance of a magnetic intensity on the convective flow of a ferrofluid in a chamber containing a vertical heated sheet. Outcomes showed that the rate of entropy generation witnessed a rise when an isothermal lamina was replaced by a non-uniformly warmed one, while it was reduced when an ideal inclined Lorentz force was set.…”