Multifrequency and Multidimensional Aspects of X-Ray Transport.
Abstract
The report discusses multifrequency and multidimensional aspects of radiative transfer problems. A new grey, or multigroup, equation of transfer is derived which is consistent with the moment equation often used in numerical work (i.e., in the VERA and DRAD codes). This equation involves generalization, to strong temperature gradients, of the Planck and Rosseland mean opacities. The report also discuss a possible method for solving the two-dimensional moment equations which has the potential of saving large amounts of computer time. This method, called synthesis, involves representing the two-dimensional solution by a small number of coupled, one-dimensional solutions. A numerical example is given indicating the potential of the method. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1970
- Accession Number
- AD0715476
Entities
People
- Gerald C. Pomraning
- Robert J. Latko