The calculation of the radiation exchange between two gray, diffuse
surfaces by the usual engineering method presents difficulties since it
requires a full and precise description of both surfaces. Often the major
difficulty in calculating the heat transfer rests with the accurate
determination of the surface conditions. For multi-surface enclosure
problems, or for radiation between surfaces whose mutual views are
obstructed, the evaluation of the view factor is a major effort. For many
situations, as in spacecraft or space structures, solar receivers, or
industrial furnaces, estimates using graphical and numerical techniques
are not adequate. Furthermore, in structures for which the changing
position of the sun leads to different surfaces becoming radiantly
important at different times, accurate determination of the viewfactor for
all surfaces is particularly important. The family of computer codes,
VIEW, written for NASA Langley Research Center, has been created to
accomplish this task. VIEW is an interactive program that determines the
viewfactors, graphically displays surfaces, and evaluates the solar
irradiation of an assemblage of surfaces.

The VIEW programs, inventory number LAR-14217, are written in FORTRAN 77,
C-language and Assembly language for the IBM PC and compatibles. The
graphic routines assume the use of an EGA or VGA card. The memory
requirement for the program is 412K. The standard distribution medium for
VIEW VERSION 5.6.9 is a set of eleven 360K MS-DOS format diskettes.
Program $3,000; documentation $56.

COSMIC, The University of Georgia
382 East Broad St, Athens, GA 30602-4272
706-542-3265

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