Accession Number : AD0440411


Title :   CONFAC II. A GENERAL COMPUTER PROGRAM FOR THE DETERMINATION OF RADIANT- INTERCHANGE CONFIGURATION AND FORM FACTORS


Corporate Author : NORTH AMERICAN AVIATION INC DOWNEY CA


Personal Author(s) : Toups, Kempton A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/440411.pdf


Report Date : Apr 1964


Pagination or Media Count : 295


Abstract : A numerical method is derived from the determination of the geometric radiant-interchange factors used in radiant heat transfer and illumination. A FORTRAN II digital computer program utilizing this method is developed which provides a rapid and accurate means of computation of configuration and form factors. The source of flux may be any general plane polygon and the receiver may be any general plane or nonplanar polygon, the surface of an arbitrary polyhedron, or an arbitrary combination of such surfaces. It is therefore possible to accurately determine configuration and form factors from a plane surface to another surface occluded by complex intervening surfaces. Form factors are computed rapidly -- averaging less than two seconds on the IBM 7094 for simple, unobstructed plane surfaces, and less than 30 seconds for simple polyhedra. Also, means are provided to internally generate a variety of regular polygons or polyhedra and to transform surface spatial coordinates for convenience of data entry and/or motion simulation. Simplicity of data entry, flexibility of application, and economy of operation are principal features of this program. Sample problems illustrating these important aspects are provided.


Descriptors :   *COMPUTER PROGRAMMING , DIGITAL COMPUTERS , GEOMETRIC FORMS , HEAT TRANSFER , ILLUMINATION


Subject Categories : Computer Programming and Software


Distribution Statement : APPROVED FOR PUBLIC RELEASE