Multilevel method to compute the lambda modes of the neutron diffusion equation
, , oraz
24 cze 2017
O artykule
Data publikacji: 24 cze 2017
Zakres stron: 225 - 236
Otrzymano: 16 kwi 2017
Przyjęty: 24 cze 2017
DOI: https://doi.org/10.21042/AMNS.2017.1.00019
Słowa kluczowe
© 2017 A. Carreño, A. Vidal-Ferrándiz, D. Ginestar, G. Verdú, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
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MBNM
1: | Orthonormalize | ▹ M |
2: | Compute the Ritz approximations | ▹ R |
3: | conv=0 (conv indicates the number of converged eigenvalues) | |
4: | ||
5: | Compute | ▹ C |
6: | | |
7: | Orthonormalize( | ▹ M |
8: | Compute the Ritz approximatisons | ▹ R |
9: | | |
10: | | ▹ C |
11: | Λ = [Λ, | ▹ L |
12: | | |
| ||
14: | | |
15: | | |
16: | | |
17: | conv=i | |
18: | | |
19: | | |
20: |
Computational times of Ringhals reactor
DoFs | CPU Time | |||||
---|---|---|---|---|---|---|
FED | Fine | Coarse | Krylov-Schur | Multilevel (CM) | its. MBNM | Improv. |
2 | 334510 | 125730 | 237s | 180s (35s) | 5 | 24% |
3 | 1106180 | 411992 | 1864s | 1596s (463s) | 4 | 14% |
Computational times of cuboid reactor
DoFs | CPU Time | ||||
---|---|---|---|---|---|
FED | Fine | Coarse | Krylov-Schur | Multilevel (CM) | Improv. |
2 | 137842 | 18522 | 106s | 87s (3.8s) | 17% |
3 | 453962 | 59582 | 794s | 555s (41s) | 30% |