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发表于 2008-3-20 20:47:10
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网格检查体积为负怎么办?
我今天也遇到这样的问题,这是我找到的答案:
答1: 从错误信息提示可以看出存在负体积的网格单元,而引起错误。
这一般是因为计算域存在尖锐的拐角而引起的,可以通过都计算域进行合理的简化,重新划分网格来解决。
答2:需要重新划分网格,可以将比较复杂的题划分为几个简单的体,然后再画网格,
答3:网格负体积 不知道你用的时spilt还是abstract,如果时abstract 注意重合部分是否保留了, 网格步长不要太大,拐角处网格可能没有附上去,造成负体积
答4:It probably means that your grid is bad - go back to gambit and check the quality (click on the "mirror-glas" icon down to the right). Identify where you have bad cells (skewness>=1) and try adjust the gradings etc. to fix it.
答5:I agree with Jonas that negative volumes usually show up due to a bad grid, i.e. inappropriate meshing density..
You can however try to fix this problem inside of the solver by doing a repair-facehandedness(rfh)..This is under :
grid > modify-zone > rfh
Once you do this, check the quality of the grid to see if any negative volumes still show up..If they do, you will have to go back to the pre-processor and adjust the mesh density.
祝你好运!
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