Comparison of iterative methods for solution of the CMFD problem in the nonlinear nodal method
- Purdue Univ., West Lafayette, IN (United States)
Modern nodal diffusion codes based on the nonlinear iterative nodal method employ standard multilevel iteration strategies and acceleration techniques to solve the coarse-mesh finite difference (CMFD) problem. Two of the most popular methods are the fission source iteration method employing line successive overrelaxation (LSOR) and the cyclic Chebyshev semi-iterative (CCSI) method. In the last several years, considerable research has been performed on a nonstationary class of techniques, collectively known as Krylov subspace methods. Recently, it was demonstrated that the execution time of one of these methods, biconjugate gradient stabilized (Bi-CGSTAB), was competitive with both LSOR and CCSI for the solution of the fixed-source CMFD problem. The work reported here extends this work to the nonlinear nodal method and incorporates the nodal expansion method (NEM) coupling coefficient update into the solution algorithm.
- OSTI ID:
- 411797
- Report Number(s):
- CONF-951006--
- Journal Information:
- Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 73; ISSN 0003-018X; ISSN TANSAO
- Country of Publication:
- United States
- Language:
- English
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