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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.
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]
Copyright of Journal of Computational Physics is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 136088389
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Computational+Physics%22">Journal of Computational Physics</searchLink>. Jul2019, Vol. 388, p335-349. 15p.
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  Data: • 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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  Data: <i>Copyright of Journal of Computational Physics is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.jcp.2019.03.019
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 335
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      – SubjectFull: Transport theory
        Type: general
      – SubjectFull: Inverse scattering transform
        Type: general
      – SubjectFull: Degrees of freedom
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      – TitleFull: Efficient parallel solution of the 3D stationary Boltzmann transport equation for diffusive problems.
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            – D: 01
              M: 07
              Text: Jul2019
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              Y: 2019
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