Automatic Mesh Coarsening for Discrete Ordinates Codes
This paper describes the use of a ''mesh potential'' function for automatic coarsening of meshes in discrete ordinates neutral particle transport codes. For many transport calculations, a user may find it helpful to have the code determine a ''good'' neutronics mesh. The complexity of a problem involving millions of mesh cells, dozens of materials, and many energy groups makes it difficult to determine an adequate level of mesh refinement with a minimum number of cells. A method has been implemented in PARTISN (Parallel Time-dependent SN) to calculate a ''mesh potential'' in each original cell of a problem, and use this information to determine the maximum coarseness allowed in the mesh while maintaining accuracy in the solution. Results are presented for a simple x-y-z fuel/control/reflector problem.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Defense Programs (DP) (US)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 7999
- Report Number(s):
- LA-UR-99-994; TRN: AH200116%%152
- Resource Relation:
- Conference: International Conference on Mathematics and Computations (M and C '99), Madrid (ES), 09/27/1999--09/30/1999; Other Information: PBD: 11 Mar 1999
- Country of Publication:
- United States
- Language:
- English
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