Space-angle approximations in the variational nodal method [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 1999.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 14 pages : digital, PDF file
- Additional Creators:
- Argonne National Laboratory
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
- The variational nodal method is formulated such that the angular and spatial approximations maybe examined separately. Spherical harmonic, simplified spherical harmonic, and discrete ordinate approximations are coupled to the primal hybrid finite element treatment of the spatial variables. Within this framework, two classes of spatial trial functions are presented: (1) orthogonal polynomials for the treatment of homogeneous nodes and (2) bilinear finite subelement trial functions for the treatment of fuel assembly sized nodes in which fuel-pin cell cross sections are represented explicitly. Polynomial and subelement trial functions are applied to benchmark water-reactor problems containing MOX fuel using spherical harmonic and simplified spherical harmonic approximations. The resulting accuracy and computing costs are compared.
- Published through SciTech Connect.
M and C '99 Conference, Madrid (ES), 09/27/1999--09/30/1999.
Lewis, E. E.; Taiwo, T.; Palmiotti, G.
- Funding Information:
View MARC record | catkey: 14363572