Accelerating Domain-Decomposed Parallel Matrix MOC with Multi-Domain Coupled PGMRES Algorithm
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摘要: 研究了空间区域分解并行矩阵特征线方法(MOC)及相应的多区域耦合并行广义极小残差法(PGMRES)加速算法。该算法基于PETSc并行数值库,直接耦合求解内边界角通量,可大幅提高收敛效率。数值验证结果表明,多区域耦合PGMRES算法具有较高的计算精度和良好的加速效果。
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关键词:
- 矩阵MOC方法 /
- 区域分解 /
- 多区域耦合PGMRES算法
Abstract: In this paper, spacial domain-decomposed parallel Matrix MOC and relevant multi-domain coupled PGMRES accelerating algorithm were studied. In this algorithm, PGMRES from PETSc library was adopted to solve the angular flux of inner boundaries directly, thus improving the convergence rate. Numerical results demonstrated that the multi-domain coupled PGMRES algorithm keeps good accuracy and obtains great speed ratio.-
Key words:
- Matrix MOC /
- Domain-decomposation /
- Multi-domain coupled PGMRES algorithm
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