McGuire, J.H., 1952. THE CALCULATION OF HEAT TRANSFER BY RADIATION. Fire Research Notes 20
Expressions are derived by means of which the radiation intensity at n point due to various shapes of heated surface (e.g. disc, sphere, rectangle) may be computed. The expressions are concerned only with the relative geometry of the surface and are known as configuration factors. The various properties of configuration factors are listed. Total radiation flux over a finite area of receiver is also considered. Expressions are derived for the radiative heat transfer between surfaces when multiple reflections can occur.