Accession Number:

AD0292067

Title:

ISOLATE - A DIGITAL COMPUTER SOLUTION TO PLANE PARALLEL RADIATIVE TRANSFER

Descriptive Note:

Corporate Author:

INTERNUCLEAR CO INC CLAYTON MO

Report Date:

1962-10-01

Pagination or Media Count:

1.0

Abstract:

The digital computer program, ISOLATE, is designed to solve the Boltzmann transport equation for problems with the following properties monodirectional sources incident at any angle to a boundary plane parallel geometry anisotropic scattering in a se ies of contiguous media monoenergetic radiation or particle consideration anisotropic diffuse sources at the slab boundaries and isotropic or symmetrical reflection at the slab boundaries. Problems are solved by expressing the Boltzmann transport equation and the flexible boundary condition equations in difference equation form on the phase space. The difference equations are solved by a direct me hod, which takes advantage of special properties of the matrices. It is a novel approach to solutions of such problems and it has proved to be a much faster and more efficient method than the usual iterative methods in many practical instances. The formulation and the solutions of the difference equations are described and detailed instructions are included to facilitate both the application of the code to physical problems and the actual operation of the code. The code is written in the language of FORTRAN II. Problem running times with the direct method of solution rarely exceed fifteen minutes on the IBM 7090. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE