ISSN Online: 2377-424X
ISBN Print: 0-89116-559-2
International Heat Transfer Conference 8
AN EXPERIMENTAL STUDY OF FREE CONVECTIVE HEAT TRANSFER FROM SHORT CYLINDERS WITH "WAVY" SURFACES
Abstract
Free convective heat transfer rates from short cylinders with "wavy" surfaces have been experimentally determined. Tests were undertaken with the cylinders set at various angles between 0° and 90° to the horizontal. Cylinders with three different sizes of surface wave amplitude as well as smooth cylinders were used in the study. These cylinders had various heated length - to - mean diameter ratios. The mean heat transfer rates were determined using the transient method, i.e. by heating the cylinders and then measuring their temperature - time variation while they cooled. The results for the horizontal and vertical cases have first been correlated by assuming that the effects of length-to-diameter ratio and surface waviness can be separately considered. The inclined cylinder results have then been correlated in terms of these vertical and horizontal cylinder results.