3-D UNSTRUCTURED HEXAHEDRAL-MESH Sn TRANSPORT METHODS

[摘要] This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). We have developed a method for solving the neutral-particle transport equation on 3-D unstructured hexahedral meshes using a S{sub n} discretization in angle in conjunction with a discontinuous finite-element discretization in space and a multigroup discretization in energy. Previous methods for solving this equation in 3-D have been limited to rectangular meshes. The unstructured-mesh method that we have developed is far more efficient for solving problems with complex 3-D geometric features than rectangular-mesh methods. In spite of having to make several compromises in our spatial discretization technique and our iterative solution technique, our method has been found to be both accurate and efficient for a broad class of problems.

[发布日期] 2000-11-01 [发布机构] Los Alamos National Laboratory

[关键词] Lanl;Neutral-Particle Transport;Transport;99 General And Miscellaneous//Mathematics, Computing, And Information Science