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柱体绕流的自适应数值模拟方法
  • 摘要

    发展了基于四叉树数据结构的网格生成和流动的Navier-Stokes方程数值求解器.采用压力梯度或者密度梯度的绝对值作为网格自适应的控制参量,同时采用基于最小二乘法的无网格方法处理对于一般Cartesian网格难于处理的物面边界条件.采取了绕方柱流动和绕圆柱流动的经典二维定常和非定常层流算例对所发展的方法进行了验证.计算的结果验证了所发展的方法在处理绕流流动时的合理性和有效性.从而也为将来数值模拟具有较复杂几何外形的流动提供了一种网格布局合理、高效,边界处理简单易行的新思路.

  • 作者

    李现今  郑洪伟  杨国伟  LI Xian-jin  ZHENG Hong-wei  YANG Guo-wei 

  • 作者单位

    中国科学院力学研究所高温气体动力学国家重点实验室,北京,100190

  • 刊期

    2012年14期 ISTIC

  • 关键词

    自适应网格  Cartesian网格  无网格法  数值模拟 

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