MHD Mixed Convection in a Lid-Driven Cavity Including Heat Conducting Solid Object and Corner Heaters with Joule Heating

Abstract

The hydromagnetic mixed convection flow and heat transfer in a top sided lid-driven square enclosure is numerically simulated in this paper following a finite volume approach based on the SIMPLEC algorithm. The enclosure is heated by corner heaters which are under isothermal boundary conditions with different lengths in bottom and right vertical walls. The lid is having lower temperature than heaters. The other boundaries of the enclosure are insulated. A uniform magnetic field is applied along the horizontal direction. A heat conducting horizontal solid object (a square cylinder) is placed centrally within the outer enclosure. Shear forces through lid motion, buoyancy forces due to differential heating and magnetic forces within the electrically conducting fluid inside the enclosure act simultaneously. Heat transfer due to forced flow, thermal buoyancy, Joule dissipation and conduction within the solid object are taken into account. Simulations are conducted for various controlling parameters such as the Richardson number (0.1 Ri 10), Hartmann number (0 Ha 50) and Joule heating parameter (0 J 5) keeping the Reynolds number based on lid velocity fixed as Re ¼ 100. The flow and thermal fields are analyzed through streamline and isotherm plots for various Ha, J and Ri. Furthermore, the pertinent transport quantities such as the drag coefficient, Nusselt number and bulk fluid temperature are also plotted to show the effects of Ha, J and Ri on them.

Analysis of Entropy Generation in Natural Convection of Nanofluid inside a Square Cavity Having Hot Solid Block: Tiwari and Das’ Model

“…Effects of inclination angle on natural convection flow in a square enclosure with a centered internal conducting square block are analyzed by Das and Reddy [14] by using finite volume technique. Ray and Chatterjee [15] made a work on solid object inserted cavity with corner heating and found similar results.…”

Three-Dimensional Study of Magnetohydrodynamic Natural Convection, Entropy Generation, and Electromagnetic Variables in a Nanofluid Filled Enclosure Equipped with Inclined Fins

“…The effect of an obstacle − (square or circular, fixed or rotating) in a lid-driven closed enclosure or of several obstacles − (of different shapes) in a square cavity subjected to an external magnetic field has been widely treated with the aim of optimizing and improving heat transfer.…”

Magneto-Convective Transport of Nanofluid in a Vertical Lid-Driven Cavity Including a Heat-Conducting Rotating Circular Cylinder

“…In regard to cavity geometry as the working domain, MHD mixed convection has been extensively studied by many researchers [15][16][17][18][19]. Chatterjee and co-workers [20][21][22][23][24][25], in a series of recent articles, studied magneto-convective transport in lid-driven enclosures with or without the insertion of various types of passive element such as square and circular objects. They also considered rotation of the inserted circular object along with cavity wall movement.…”