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    王勇献 张理论 刘 巍 车永刚 徐传福 王正华. CFD并行计算中的多区结构网格二次剖分方法与实现[J]. 计算机研究与发展, 2013, 50(8): 1762-1768.
    引用本文: 王勇献 张理论 刘 巍 车永刚 徐传福 王正华. CFD并行计算中的多区结构网格二次剖分方法与实现[J]. 计算机研究与发展, 2013, 50(8): 1762-1768.
    Wang Yongxian, Zhang Lilun, Liu Wei, Che Yonggang, Xu Chuanfu, and Wang Zhenghua. Grid Repartitioning Method of Multi-Block Structured Grid for Parallel CFD Simulation[J]. Journal of Computer Research and Development, 2013, 50(8): 1762-1768.
    Citation: Wang Yongxian, Zhang Lilun, Liu Wei, Che Yonggang, Xu Chuanfu, and Wang Zhenghua. Grid Repartitioning Method of Multi-Block Structured Grid for Parallel CFD Simulation[J]. Journal of Computer Research and Development, 2013, 50(8): 1762-1768.

    CFD并行计算中的多区结构网格二次剖分方法与实现

    Grid Repartitioning Method of Multi-Block Structured Grid for Parallel CFD Simulation

    • 摘要: 在多区结构网格计算流体动力学(computational fluid dynamics, CFD)并行模拟中, 为了与并行计算资源相适应, 经常需要对原始流场网格进行二次剖分与区块分组.在对区块分组和网格二次剖分进行了总结综述的基础上, 重点提出针对多区结构网格二次剖分的两种策略:几何剖分和嵌套二分.基于这两种策略完成了剖分软件工具TH-MeshSplit, 可实现初级方式、专业方式和专家方式3种运行方式, 为用户在自动化与灵活性方面提供了多样化选择.数值实验结果表明, 两种剖分策略及其实现软件可在较短时间内完成复杂的剖分, 剖分后的网格在负载平衡性、计算通信比等方面具有更优的性能, 从而为后续CFD流场的高效并行加速求解奠定了基础.

       

      Abstract: In parallel computational fluid dynamics ( CFD ) applications with multi-block structured grids , to exploit fully the available resources of CPUs and / or memories for parallel computing platform , it is a common approach to repartition the original grids to obtain more sub-blocks , each with smaller volume.Two strategies of grid repartitioning are proposed for multi-block structured grids CFD application in this paper based on the investigation of existing approaches.Furthermore , a software tool named TH-MeshSplit is developed to facilitate the process of grid repartitioning , in which a simple heuristic strategy is used to solve the combinatorial optimization for the optimal splitting and yield a near-optimal solution for the problem.TH-MeshSplit can run in three modes : fully-automatic mode , half-automatic mode and manual mode , which provides user the freedom of choices and shows a good flexibility of the tool.Some numerical experiment results were reported.By evaluating the quality of grids according to several criteria , it is shown that a resulting grid with high quality can be achieved after the repartitioning and it thus confirms the validity of our grid repartitioning approach.

       

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