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嵌套网格技术中的Collar网格和虚拟网格方法

Collar Grid and Virtual Grid Methods in Embedding Technique

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【作者】 李孝伟范绪箕乔志德

【Author】 LI Xiao\|wei\+1,\ FAN Xu\|ji\+1,\ QIAO Zhi\|de\+2(11011 Institute, Shanghai Jiaotong University, Shanghai\ 200030, China; 2Northwestern Polytechnical University, Xi’an\ 710072,China)

【机构】 上海交通大学1011研究室西北工业大学翼型研究中心 上海 200030上海 200030陕西西安 710072

【摘要】 针对嵌套网格技术中的结合部问题,提出了Collar网格和虚拟网格方法.用双曲型微分方程生成的处于结合部的有两个边界分别处于不同固定曲面上的Collar网格,在保证计算网格的生成方便快捷而且网格质量高的前提下,解决了为物体结合部的内外边界点提供有效插值单元的问题.虚拟网格为紧贴物面的面网格,它的作用是将物面边界条件传递给其它网格的边界面,而其本身不作流场计算.计算实践表明,将Collar网格和虚拟网格结合起来应用在嵌套网格技术中能保证几何外形不发生变化,有效地处理各种复杂组合体外形的结合部问题.

【Abstract】 The Collar grid method and the virtual grid method are jointly used in the embedding technique to solve the problem of finding the interpolating cells among the internal and external boundary points near the joint regions. With different boundary planes generated along different fixed surfaces, the Collar grid obtained using the hyperbolic partial differential equations can ensure to generate high\|quality grids and to provide real interpolating cells for the boundary points on the joint regions. The main purpose of the virtual grid is to convert a solid wall boundary condition into an interface condition while no fluid flow computations are conducted within the virtual grid. The computational results of several configurations show that the currently developed embedding technique with Collar grid and virtual grid can effectively treat the geometrical configuration and can more accurately predict the flow over complex configurations with intersecting surfaces.

【关键词】 虚拟网格Collar网格嵌套网格
【Key words】 virtural gridCollar gridembedding grid
  • 【文献出处】 计算物理 ,Chinese Journal of Computation Physics , 编辑部邮箱 ,2003年02期
  • 【分类号】V211.3
  • 【被引频次】6
  • 【下载频次】189
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