| 跨流域三维复杂绕流问题的气体运动论并行计算 |
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| 引用本文： | 李志辉,张涵信.跨流域三维复杂绕流问题的气体运动论并行计算[J].空气动力学学报,2010,28(1). |
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| 作者姓名： | 李志辉 张涵信 |
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| 作者单位： | 1. 国家计算流体力学实验室,北京,100191
2. 中国空气动力研究与发展中心超高速研究所,四川,绵阳,621000 |
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| 基金项目： | 国家自然科学基金面上项目(2003.01~2008.12)资助(90205009) |
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| 摘 要： | 通过研究求解描述跨流域三维绕流问题的Boltzmann模型方程气体运动论耦合迭代数值格式,分析气体运动论数值计算方法的内在并行性;从变量依赖关系、数据通信与并行可扩展性三方面开展基于离散速度空间区域分解计算的研究,发展求解稀薄流到连续流跨流域三维复杂绕流问题的并行算法。通过对不同Knudsen数、不同马赫数、不同攻角三维球体及返回舱绕流的并行计算,计算结果与实验数据和理论分析吻合较好。研究表明,该并行算法负载平衡和并行可扩展性较好,对不同并行计算机系统具有很好适应性,显示直接求解分子速度分布函数的气体运动论计算方法有良好的并行计算特性。
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| 关 键 词： | 航天器绕流 气体分子运动论 Boltzmann模型方程 离散速度坐标法 有限差分法 并行计算 |
Gas-kinetic parallel computation for three-dimensional complex problems covering various flow regimes |
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| LI Zhi-hui,ZHANG Han-xin.Gas-kinetic parallel computation for three-dimensional complex problems covering various flow regimes[J].Acta Aerodynamica Sinica,2010,28(1). |
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| Authors: | LI Zhi-hui ZHANG Han-xin |
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| Institution: | National Laboratory for Computational Fluid Dynamics/a>;No.37 Xueyuan Road/a>;100191 Beijing/a>;China/a>;China Aerodynamics Research and Development Center/a>;HAI/a>;621000/a>;Mianyang/a>;Sichuan/a>;China |
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| Abstract: | The gas-kinetic numerical schemes directly to solve the Boltzmann model equation are developed for the three-dimensional problems covering various flow regimes,and the intrinsic parallelization and the computing rule of the gas-kinetic numerical algorithm are analyzed.The computing technique of parallel domain decomposition in the discrete velocity space is presented by the study on variable dependency relations,data communication and parallel expansibility of the gas-kinetic numerical method.The gas-kineti... |
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| Keywords: | spacecraft flows kinetic theory of gases Boltzmann model equation discrete velocity ordinate method finite difference method parallel computing |
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