PREDICTION OF HEAT TRANSFER BY NATURAL CONVECTION IN CLOSED CYLINDERS HEATED FROM BELOW

Use is made of the Malkus-Veronis power integral technique to predict heat-transfer rates in fluids contained in vertical right cylinders heated on a horizontal bottom and cooled on a horizontal top end. Results are obtained for cells with either thermally insulating or conducting sidewalls. Closed-form relations are given for Nusselt number in terms of Rayleigh number based on cell height and on an adjusted wave-number" which depends on height-to-diameter ratio for circular cylinders and height-to-side ratios for square cylinders. Comparisons between the predictions and previously reported data are shown. © 1969."