High-Speed Parallel Solution of the Neutron Diffusion Equation with the Hierarchical Domain Decomposition Boundary Element Method Incorporating Parallel Communications

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概要

• 論文の詳細を見る

• A hierarchical domain decomposition boundary element method (HDD-BEM) for solving the multiregion neutron diffusion equation (NDE) has been fully parallelized, both for numerical computations and for data communications, to accomplish a high parallel efficiency on distributed memory message passing parallel computers. Data exchanges between node processors that are repeated during iteration processes of HDD-BEM are implemented, without any intervention of the host processor that was used to supervise parallel processing in the conventional parallelized HDD-BEM (P-HDD-BEM). Thus, the parallel processing can be executed with only cooperative operations of node processors. The communication overhead was even the dominant time consuming part in the conventional P-HDD-BEM, and the parallelization efficiency decreased steeply with the increase of the number of processors. With the parallel data communication, the efficiency is affected only by the number of boundary elements assigned to decomposed subregions, and the communication overhead can be drastically reduced. This feature can be particularly advantageous in the analysis of three-dimensional problems where a large number of processors are required. The proposed P-HDD-BEM offers a promising solution to the deterioration problem of parallel efficiency and opens a new path to parallel computations of NDEs on distributed memory message passing parallel computers.

• 社団法人 日本原子力学会の論文

著者

• Tsuji Masashi

  Department Of Nuclear Engineering Graduate School Of Engineering Hokkaido University

• CHIBA Gou

  Department of Quantum Energy Engineering, Faculty of Engineering, Hokkaido University

• Chiba G

  Japan Nuclear Cycle Dev. Inst. Ibaraki

• Chiba Gou

  Department Of Quantum Energy Engineering Faculty Of Engineering Hokkaido University

• Tsuji M

  Hokkaido Univ. Sapporo

• Tsuji Masashi

  Department Of Electrical Engineering Graduate School Of Engineering Tokyo University Of Agriculture

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