Coupled convective heat transfer from an inclined flat plate enclosure

Abstract EN

The problem of the coupling effect between free convection inside a rectangular enclosure and forced convection outside is investigated.

The bottom plate of the enclosure is isothermal while the two side walls are adiabatic.

The enclosure which is inclined at angles between 40° and 90° has an aspect ratio AR ranging from ل to 10.

The Rayleigh number (based on the height of the enclosure) is in the range Z?a<8xl03 while the Reynolds number of the external flow Z?e<3xl05.

The accuracy of the numerical scheme used for solving the governing equations is first verified by solving the standard cavity problem (internal free convection only) and comparing results with those obtained by previoùs investigators.

The coupling effect between the internal and external regimes resulted in a reduction in the heat rate in comparison with the standard problem.

The rate of heat transfer is found to be maximum at AR = 2 and decreases with further increase س؛م• The increase of the inclination angle is found to reduce the heat transfer for AR < 4 while increasing it for AR > 4.

The temperature reversals occur inside the enclosure and are slightly affected by the external flow.

The unidirectional flow results in heat transfer rates lower than those obtained for the corresponding counterflow regime.