Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
ANALYTICAL METHODS TO CALCULATE THE RADIATION VIEW FACTOR BETWEEN DISKS – A REVIEW
Submission Author:
Vicente de Paulo Nicolau , SC , Brazil
Co-Authors:
Vicente de Paulo Nicolau
Presenter: Vicente de Paulo Nicolau
doi://10.26678/ABCM.ENCIT2022.CIT22-0006
Abstract
The article deals with the development of the equations used to calculate the radiation view factors between disks. Two methods are available: the first one, from the contour integration method and applicable to parallel disks, and a second method coming from spherical cavities. In such a case, disks need to be inserted in the cavity, or one spherical cavity must be drawn around the disks to determine two independent and not intercepting caps. The first method presents more compact equations and is the most used in the area, despite its limitation to parallel disks case. Both methods show equal numerical results for this disposition, although with very dissimilar equations. In the text the equivalence between equations and calculation methods is demonstrated. Finally, the spherical cavity method has a particular advantage in solving problems when disks are not parallel, but disks must define one specific spherical cavity and special attention is necessary.
Keywords
thermal radiation, radiation view factor, circular disk
