Abstract

Following complex mathematical analysis, the authors have found exact expressions for the elusive configuration factor between a circle and the three coordinate axes. This new factor will bring considerable independence and versatility to radiative transfer analysis. However, it is still necessary for many engineering and architectural applications to find the value of the said factor for points lying on a plane at an arbitrary position i.e. askew to the former reference directions. By virtue of the radiation vector theory, the calculation is performed whether the angles that the plane forms with the previous axes are known. If the receiving plane cuts the disk in two halves a new original factor is also presented.