A Numerical Study of Natural Convection in a Tilted Cavity with Two Baffles Attached to its Isothermal Walls

摘要

The purpose of this study is to investigate the effect of inclination angle on flow field and heat transfer in a differentially heated square cavity with two insulated baffles attached to its isothermal walls. The isothermal walls are at different temperatures. The walls that make an angle Φ with the horizontal are adiabatic. In our formulation of governing differential equations, mass, momentum and the energy equations are applied to the cavity and the baffles. To solve the governing differential equations a finite volume code based on Pantenkar's simpler method is utilized. The results are presented for various Rayleigh number in form of streamlines, isotherms as well as Nusselt number. It is observed that for all baffle lengths and baffle positions when Φ=90° the Nusselt number is almost minimum. In addition the Nusselt number decreases as baffle length increases, generally. Finally it is shown that Nusselt number changes with baffles position.