On the laminar and turbulent free convection heat transfer from a vertical plate over the entire range of Prandtl numbers

Abstract

In a number of papers, Arpaci et al. (Int. J. Heat Mass Transfer, 29, 1071 (1986); 40, 3819 (1997) obtained equations for the laminar and turbulent heat transfer in free convection from a vertical plate over the entire range of Prandtl numbers. The objective of the present paper is to note that their approach for the laminar case is similar to that of Ruckenstein (AIChE Journal, 26, 850 (1980). Their treatment of the turbulent case differs from that of Ruckenstein and Felske (J. Heat Transfer, 102, 773 (1980) and arguments are brought to demonstrate that the latter is more plausible than the former.