Graphical calculation of half-cooling times

Abstract

This paper proposes a general approximate method of predicting the variation of temperature at the thermal centre and the mean temperature during cooling of bodies of any geometrical shape. The method is based on graphically determining the initial and exponential half-cooling times in simple geometric shapes. For this purpose, two diagrams have been constructed to depict these dimensionless times, plus the prime root of the Biot equation and other useful variables for the indirect approximate calculation of thermophysical parameters. © 1990.