[转帖]精彩网格图片

[这个贴子最后由houston在 2005/11/22 06:18pm 第 1 次编辑]

hope it helpful for you.
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最新回复

  • qianzd (2005-11-23 11:41:39)

    好漂亮的结构化网格,什么软件做的,介绍一下.
  • houston (2005-11-23 14:35:23)

    Gridgen弄的
    转贴过来的
    觉得这个网格生成得真是好.
  • diqian (2005-11-23 18:52:40)

    真的好漂亮
  • jeffjuju (2005-11-23 19:45:59)

    请问,这个应用在什么问题呢?
  • houston (2005-11-24 11:06:10)

    应用在机翼问题
    看过这样的图后,觉得对自己的研究非常有帮助
    可能事先,你不会想到用结构网格也可以对这么复杂的边界几何形状生成正交性这么好的网格.
  • jeffjuju (2005-11-25 11:04:15)

    谢谢哦,我做的多是算法方面,对于模型设计不多,所以一般都涉及不到这么复杂的几何形状,对于网格的知识特别缺乏不过还是不得不说,这张图看起来真漂亮呀。
  • paradize (2005-11-25 22:33:40)

    网格质量确实不错,不过这样的三元翼型的网格总数也不少吧?
  • 东岸线 (2005-11-30 23:07:53)

    看不懂
  • houston (2005-12-04 08:26:45)

    网格数不会怎么多,毕竟是二维的问题,由这张图给我们一个启发,那就是不一定稍复杂一点的几何形状就用非结构网格,结构网格很成熟的.
  • chen791111 (2005-12-07 16:56:29)

    不错啊
  • houston (2005-12-09 21:14:21)

    这些老外很多弄起东西来还真细心
    不知国内有没有人整得这么仔细
    贴点图来分享一下...
  • 周jy (2006-6-25 22:35:52)

    怎么看得出网格生成的好坏,或者这个网格进行计算合不合理?
  • tagarh (2006-6-26 16:38:38)

    zz网格质量:
    Jacobian(必须为正值,即网格体积必须为正),网格的正交性,最小边与最大边的比值,扭角(skew angle, skewness)
    网格的正交性: 每一个网格的体积和其的长,宽,高的乘积的比A=V/(a*b*c). 所以正交性越好,A就越接近1,因为网格更接近长方体。
    Cell skewness is calculated by determining the intersection angles of each individual face and its four adjacent neighbors. The largest of these is considered to be the cell skewness (0.0 implies orthogonality)

    Mesh Quality (Tgrid Help)
    Mesh quality is determined by four basic measures: clustering, smoothness,  skewness, and aspect ratio.  The relationship between these criteria and the numerical solution obtained for the computational grid is discussed in detail in Boundary Mesh Quality, and summarized briefly here.
    The requirement for clustering is simply that the mesh be fine enough to resolve the primary features of the flow being analyzed. You can control the resolution with the boundary mesh that you start from and also with the parameters that control the generation of the interior mesh.  
    In a high-quality mesh, the change in size  from one face or cell to the next should be gradual (smooth); large differences in size between adjacent faces or cells will result in a poor computational grid because the differential equations being solved assume that the cells shrink or grow smoothly.  (Figure 1 illustrates different changes in size for triangular cells.)
    Skewness determines how close to ideal (i.e., equilateral or equiangular) a face or cell is (see Figure 2).
    Highly skewed  faces and cells are unacceptable because the equations being solved assume that the cells are relatively equilateral/equiangular.
    Aspect ratio can also be used to determine how close to ideal a face or cell is. The aspect ratio of a face or cell is simply the ratio of the longest edge length to the shortest edge length. For an equilateral face or cell (e.g., an equilateral triangle or a square), the aspect ratio will be 1. For less regularly-shaped faces or cells, the aspect ratio will be greater than 1, since the edges  differ in length.
    For triangular and tetrahedral faces and cells and for pyramids, you can usually focus on improving the  skewness, and the smoothness and aspect ratio will consequently be improved as well. For prisms (including 2D quadrilateral cells),  however, it is important to check the aspect ratio and/or the change in size in addition to the skewness, because  it is possible to have a large jump in cell size between two cells with low skewness (see Figure 3) or a high-aspect-ratio low-skew cell (such as the quadrilateral on the  right in Figure 3).
  • nisaizhen (2006-10-24 23:28:46)

  • charlesboy (2006-11-16 13:59:11)

    看起來挺不賴的,有教學嗎??
  • caa (2006-11-16 14:14:12)

    做得真不错!
  • summersun (2006-12-09 08:24:18)

    这个很漂亮。不过估计查过后还是需要改。很多点可能不适合计算啊。
  • gaogt0623 (2007-1-15 14:02:58)

    敢问楼主有这个网格的原文件没,能不能发给我一个。急需,谢谢
    gavin691@sohu.com
  • lyxwp (2007-4-01 10:27:00)

    生成的漂亮,可计算以后估计就不行了
  • laoda2313 (2007-4-06 18:51:57)

    不错的网格