Efficient parallel solution of the 3D stationary Boltzmann transport equation for diffusive problems.
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| Title: | Efficient parallel solution of the 3D stationary Boltzmann transport equation for diffusive problems. |
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| Authors: | Moustafa, Salli1,2 (AUTHOR) salli.moustafa@edf.fr, Févotte, François1 (AUTHOR) francois.fevotte@edf.fr, Faverge, Mathieu2,3 (AUTHOR) mathieu.faverge@inria.fr, Plagne, Laurent1 (AUTHOR) laurent.plagne@edf.fr, Ramet, Pierre2,4 (AUTHOR) pierre.ramet@inria.fr |
| Source: | Journal of Computational Physics. Jul2019, Vol. 388, p335-349. 15p. |
| Subjects: | Transport theory, Inverse scattering transform, Degrees of freedom |
| Abstract: | • High performance sweep algorithm including 3 nested levels of parallelism. • A novel scalable PDSA acceleration technique for diffusive problems. • Full Core PWR computation with 1012 DoFs solved in 45 min using 1536 cores. This paper presents an efficient parallel method for the deterministic solution of the 3D stationary Boltzmann transport equation applied to diffusive problems such as nuclear core criticality computations. Based on standard MultiGroup-Sn-DD discretization schemes, our approach combines a highly efficient nested parallelization strategy [1] with the PDSA parallel acceleration technique [2] applied for the first time to 3D transport problems. These two key ingredients enable us to solve extremely large neutronic problems involving up to 1012 degrees of freedom in less than an hour using 64 super-computer nodes. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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