| 网格不匹配度对计算精度影响研究 |
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| 引用本文： | 杨善华,喻虹.网格不匹配度对计算精度影响研究[J].周口师范学院学报,2004,21(5):46-50. |
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| 作者姓名： | 杨善华 喻虹 |
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| 作者单位： | 北京应用物理与计算数学研究所,北京,100088 |
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| 基金项目： | 中国工程物理研究院科研项目，国家高技术研究发展计划(863计划) |
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| 摘 要： | 采用理论分析、解析、数值模拟等多种手段,研究网格不匹配度对计算精度的影响.设计了一种具有精确解的多次激波冲击压缩计算模型,使用二维弹塑性流体动力学有限元程序进行了大量的数值模拟.通过比对数值模拟结果与精确解的差异,半定量地给出了网格不匹配度对计算精度的影响,其结果对复杂物理计算中网格最大不匹配度的确定有一定的指导意义.
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| 关 键 词： | 计算流体动力学 网格不匹配度 计算精度 |
| 文章编号： | 1671-9476(2004)05-0046-05 |
| 修稿时间： | 2004年7月20日 |
Influence of mesh unmatchness on computational accuracy |
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| YANG Shan-hua,YU Hong.Influence of mesh unmatchness on computational accuracy[J].Journal of Zhoukou Normal University,2004,21(5):46-50. |
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| Authors: | YANG Shan-hua YU Hong |
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| Abstract: | : By means of theoretical study ,analytical deduction and numerical simulations , this thesis has studied the influence of mesh unmatchness on computational accuracy . The calculating model which has accurate solutions and may been compressed time after time has been designed. First , the propagation of the shock wave ,the movement of the interface and the flow field after the wave are analytically calculated ,with the accurate solutions being obtained ;then much numerical simulations are performed using 2D code . By comparing the numerical results with accurate one , the influence of mesh unmatchness on computational accuracy is explored . The conclusions of the current study are applicable in determining the maximum unmatchness of meshes in complex physics simulations . |
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| Keywords: | Computational Fluid Dynamics mesh unmatchness computational accuracy |
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