Preliminary studies of the loss of heat from leaves under conditions of free and forced convection

Abstract

An account is given of techniques and methods used in measurement of convective heat transfer from leaves of the succulent Carpobrotus.

Heat transfer was studied under still air conditions and in wind (in a specially constructed wind-tunnel) up to velocities of 300 cm sec^-1. A correlation was demonstrated between experimentally obtained values of heat transfer coefficients and theoretical values calculated from empirical formulae. At wind velocities of 300 cm sec^-1 the heat transfer coefficient for Carpobrotus was increased to seven times its value still air.