2016 Fall Meeting

Presentation information

Oral Presentation

III. Fission Energy Engineering » 307-1 Computational Science and Engineering

[2L12-16] Numerical simulation on the thermal hydraulics

Thu. Sep 8, 2016 4:05 PM - 5:25 PM Room L (Kumume City Plaza - Assembly Room 2)

Chair: Naoto Kasahara (Univ. of Tokyo)

5:05 PM - 5:20 PM

[2L16] Performance Evaluations of Communication-Avoiding Krylov Subspace Methods in multi-phase thermal-hydraulic problem

*Akie Mayumi1, Yasuhiro Idomura1, Susumu Yamada1, Takuya Ina1, Susumu Yamashita1 (1.JAEA)

Keywords:multi-phase thermal-hydraulic problem, Communication-avoiding Klylov Subspace Method, CG method

多相多成分熱流動解析コードJUPITERのPoissonソルバに省通信CG法を実装し,実問題における収束特性と処理性能を調査した.省通信化に伴う誤差の蓄積による収束特性悪化の問題を分析し,アルゴリズムを部分的に4倍精度化して収束特性を向上する手法を考案した.