david_liugc 发表于 2007-4-24 22:57

请进来看看这个模型怎么画网格（急！！）

一个三维的翼型在一个长方体流场中。翼型的一个面与长方体流场的面重合，然后从流场中去掉翼型，剩下的体积怎么也画不出来网格。
我每条线都把网格画好了的，然后自动生成体网格，可惜只能生成到面网这一步就不行了
我再手动生成了面网格，并且把每个面网格都检查了是质量可以的，还是生成不了体网格
提示老给我提示　初始化失败
ERROR:　Tg-Mesh-Domain failed with error code 1
ERROR: Tetrahedral Meshing has failed volume2(就是我要画的那个体积）。this is usually cause by problem in the face mesh, check the shewnesses of your face meshes and make sure the face mesh saizes are not too large in area of small gaps.

我只想画一个非结构的网格，请大家指点一下该怎么画。
我还在想　是不是因为是因为体积有个面不封闭了才不行的　我还试了个翼型被流场完全涵括的例子，还是不行
先谢谢了　因为要的有点急

lidi721 发表于 2007-4-25 08:06

同样的问题啊
高手给予指点啊
谢谢too

wangxyln 发表于 2007-4-25 12:32

可能存在过小的面，或者网格节点间距不合适。多改变几次网格节点间距试一下。

david_liugc 发表于 2007-4-25 16:54

可能是吧
机翼尾部是比较尖　现在问题又来了，能画体网格了，可惜不是我希望的那种，体空间的网格就好像和翼型没有关系一样，是不是要翼型的两个面都要与长方体的面有连接才行啊？

dreamfans 发表于 2007-4-28 09:36

可采用分区划分网格，看你的问题应该很好画的！

hyacinth 发表于 2007-4-28 15:39

原帖由 david_liugc 于 2007-4-24 22:57 发表 http://forum.vibunion.com/forum/images/common/back.gif
ERROR:　Tg-Mesh-Domain failed with error code 1


This error tells you that, Gambit is not able togenerate volume mesh in the domain as it is not able to generate tetcells in certain part of the domain. This means that with the giveninputs (for volume meshing) the tet mesh algorithm fails to generatethe volume mesh. The reason for this can be anything from thefollowing:-

1. High Skewness of the surface mesh:- This can be checked bychecking surface mesh quality. Then correct the region where the highlyskewed elements are present.

2. Inappropriate volume mesh size specification:- Some times byreducing the volume mesh size specification, we are able to avoid theerror.

3. Coarse mesh near the small gap:- If the gap between the two faces isvery small and the surface mesh on these two faces is course ascompared to the gap, GAMBIT is not able to create elements in this gap.

4. If surface mesh contains quad elements and one is trying to generatetet mesh in the domain, many times, GAMBITs tet meshing algorithm failsto generate a pyramid cell near the surface, sue to the size variationproblem. This can be rectified by changing some default values inEdit-->Defaults panel:- The values to change are:- Go to MESH-->TETMESH and change the value for the field PYRAMID_OFFSET_DISTANCE tosome value (say :- 0.8 or 0.5 or any other value which helps)

Please let us know if this resolve your problem.

以上来自university.fluent.com的回复

david_liugc 发表于 2007-5-4 02:01

谢谢楼上的，问题已经解决了，就是机翼尾部太尖了，还有原来生成的面里网格质量有很差的，改了下就好了

lighting0324 发表于 2008-12-8 15:39

回复 7楼 david_liugc 的帖子

你上面的图网格是怎么画出来的呀

cxzhmg 发表于 2009-2-1 20:26

同问，这个网格怎么画啊？

w.lin 发表于 2009-2-3 23:01

问一下楼主你的机翼翼型是怎么生成的？

haobaobaos 发表于 2009-2-21 16:01

:handshake :handshake 先画一下线网格一步步的往下走就行
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