Effects of orientation of the centrally placed heated baffle in an alternative configured ventilation cavity

The current study is carried out to investigate the natural convection of enclosures contains a horizontal/vertical heated baffle at its center with inlet and outlet ports on vertical walls. The vertical walls of the cavity are cold and the horizontal walls are insulated. The working medium of fluid is air with the Prandtl number 0.71. The governing equations of the problem are converted into the vorticity−stream function formulation. The finite-difference method is adopted to solve these equations. The calculations were performed for various Rayleigh numbers (10 ³- 10 ⁶) and Reynolds numbers (10, 100, 500), and the effects of the different aspect ratios (A= 0.25 , 0.5 , 1.0 , 2.0 ) are tested with the most efficient configured cavity with the baffle. The numerical results are illustrated graphically in the form of streamlines, isotherms, and local and averaged Nusselt numbers. The results show that the BB configuration cavity with both orientations of the heated baffle performs better in optimizing the heat inside the cavity. The ventilated cavity with vertical baffle transfers heat more rapidly than the horizontal baffle.