Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Development of the hierarchical domain decomposition boundary element method for solving the three-dimensional multiregion neutron diffusion equations
Autore:
Chiba, G; Tsuji, M; Shimazu, Y;
Indirizzi:
Hokkaido Univ, Fac Engn, Dept Quantum Energy Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan Hokkaido Univ Sapporo Hokkaido Japan 0608628 oro, Hokkaido 0608628, Japan
Titolo Testata:
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
fascicolo: 8, volume: 38, anno: 2001,
pagine: 664 - 673
SICI:
0022-3131(200108)38:8<664:DOTHDD>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Keywords:
neutron diffusion equation; boundary element method; domain decomposition; Newton's method; block Jacobi method; high order boundary element; non-conforming element; modern nodal method; three dimensional problems; accuracy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Chiba, G Hokkaido Univ, Fac Engn, Dept Quantum Energy Engn, Kita Ku, Kita 13,Nishi 8, Sapporo, Hokkaido 0608628, Japan Hokkaido Univ Kita 13,Nishi 8 Sapporo Hokkaido Japan 0608628 apan
Citazione:
G. Chiba et al., "Development of the hierarchical domain decomposition boundary element method for solving the three-dimensional multiregion neutron diffusion equations", J NUC SCI T, 38(8), 2001, pp. 664-673

Abstract

A hierarchical domain decomposition boundary element method (HDD-BEM) thatwas developed to solve a two-dimensional neutron diffusion equation has been modified to deal with three-dimensional problems. In the HDD-BEM, the domain is decomposed into homogeneous regions. The boundary conditions on thecommon inner boundaries between decomposed regions and the neutron multiplication factor are initially assumed. With these assumptions, the neutron diffusion equations defined in decomposed homogeneous regions can be solved respectively by applying the boundary element method. This part correspondsto the "lower level" calculations. At the "higher level" calculations, theassumed values, the inner boundary conditions and the neutron multiplication factor, are modified so as to satisfy the continuity conditions for the neutron flux and the neutron currents on the inner boundaries. These procedures of the lower and higher levels are executed alternately and iteratively until the continuity conditions are satisfied within a convergence tolerance. With the hierarchical domain decomposition, it is possible to deal with problems composing a large number of regions, something that has been difficult with the conventional BEM. In this paper, it is showed that a three-dimensional problem even with 722 regions can be solved with a fine accuracy and an acceptable computation time.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/07/20 alle ore 06:21:41