An Interferometric Study Of Coupled And Non-coupled Convective Heat Transfer From An Inclined Rectangular Cavity

TL;DRAbstract

Heat transfer from an inclined rectangular cavity with differing boundary conditions at the top plate was investigated using a Mach-Zehnder interferometer integrated with a low speed wind tunnel. Natural convection inside the cavity coupled with external natural convection at the top plate was studied for (theta) = 15(DEGREES), 45(DEGREES), and 60(DEGREES) to the horizontal. At (theta) = 60(DEGREES), coupling with external forced convection was also studied. Also, for (theta) = 60(DEGREES), the case of non-coupled heat transfer from a cavity with an isothermal top plate was studied. In all experiments the bottom hot plate was isothermal. The Rayleigh number, Ra, was varied from subcritical to 6 x 10('5) and the cavity aspect ratio, AR(,x), (length/spacing between plates) from 6.68 to 33.4. The Reynolds number of the external forced flow was constant and approximately equal to 5.8 x 10('4).;The temperature of the cold plate resulting from the coupled convective flows was found to depend

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