Experimental Investigation of Natural Convection in Inclined Rectangular Regions of Differing Aspect Ratios

An experimental investigation of steady natural convection heat transfer was carried out for finite rectangular regions. The effect of angle of inclination on heat transfer across rectangular regions of several aspect ratios was measured for Rayleigh numbers between 10³ and 10⁶. The angle of inclination varied from 0 deg (heated from above) to 180 deg (heated from below) with aspect ratios of one, three, six, and twelve. Comparison is made with past theoretical work, and a simple scaling law is derived which is valid for angles of inclination from 0 to 90 deg (vertical).