MODELING AND SIMULATION OF MHD CONVECTIVE HEAT TRANSFER OF CHANNEL FLOW HAVING A CAVITY

In this article, mathematical modeling is executed to examine MHD combined convection flow in an open channel with an enclosure which has a heated wall on left side to simulate assisting flow employing finite element method (FEM). Cold fluid flows through a channel which has an open cavity. All the parts of the cavity are adiabatic while the left wall is heated with an isothermal heater. Two enclosures are tested as square (Case 1) and rectangular (Case 2). Inside the channel flow and temperature field of magnetic effects is examined. Furthermore, simulations are conducted for Rayleigh numbers (103 ≤ Ra ≤ 105) and Hartmann numbers (0 ≤ Ha ≤ 100). For the above parameters streamlines, isotherms, average Nusselt number and average fluid temperature at the exit port, pressure and temperature gradient in the domain results are discussed. In this work heat transfer decreased by 48% and 52% as Ha increases from 0 to 100 at Ra =105 for case 1 and case 2, respectively