Application of Jacobi Polynomial Methods to the One-Speed Transport Equation,

Abstract

The transport equations associated with radiation damage studies are often solved using expansions in Legendre polynomials. The radiation damage distribution functions may be sharply peaked in the forward direction, while the Legendre polynomials, as a set, are isotropic. This requires the use of many terms in the Legendre expansion. The Jacobi polynomials, on the other hand, can have strong peaking built into their associated weight function. To test the usefulness of these polynomials the author uses them to solve the simple, one-speed, neutron transport equation. The results are then compared to the exact theory and to the results of applying Legendre methods to the same problem. This sample calculation demonstrates the clear advantage of the Jacobi polynomials in strongly non-isotropic situations. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 06, 1973
Accession Number
AD0757305

Entities

People

  • G. P. Mueller

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Boltzmann Equation
  • Distribution Functions
  • Equations
  • Mathematics
  • Polynomials
  • Radiation
  • Transport Ships

Fields of Study

  • Mathematics

Readers

  • Approximation Theory.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Solar Physics