The ASPEN Multigroup SP_N Code

John A. Turner

October 2, 1998

What is ASPEN?

ASPEN is a multigroup, simplified spherical harmonic (SP_N) package for radflow on 2D Lagrangian meshes, with material motion corrections.

JTPACK77 is used for the solution of the nonsymmetric linear systems arising from the Morel diffusion differencing scheme on which ASPEN is based.

Availability

• The latest version of the source (v25.2) is available as a tar file, either gzipped (0.6 MB) or uncompressed (3.5 MB).

• A draft version of the ASPEN manual is available as either HTML, gzipped PostScript (0.15 MB), or PostScript (0.8 MB).