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[ICEM] What is the reason for this negative determinant? |
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January 25, 2013, 11:05 |
What is the reason for this negative determinant?
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#1 |
Member
Ye Zhang
Join Date: Dec 2009
Location: Delft,Netherland
Posts: 92
Rep Power: 16 |
Hello,guys.
Now I want to simulate the flow over wind turbine rotor, but when I am doing the mesh, there is a problem that says negative determinant when I check the mesh. you can see the bad cells(green) in the picture. so I want to know what is the reason for negative determinant and how to improve the bad cells? Thank you in advance. Regards Ye |
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January 25, 2013, 12:28 |
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#3 |
Member
Ye Zhang
Join Date: Dec 2009
Location: Delft,Netherland
Posts: 92
Rep Power: 16 |
Hi, M.Ali
Thank you for your reply. I can track(see)the bad cell, what I don't know is how to improve it? The green cells that have negative determinant looks quite triangle, right? but after the sharp trailing edge, I have get two blocks, is this the right method to deal with sharp edge? regards, Ye |
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April 18, 2013, 09:59 |
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#4 |
Member
Join Date: May 2010
Posts: 57
Rep Power: 15 |
kiddmax have you found a way to sort this?
I'm having the exact same problem with a sharp edge. The geometry and even the histogram look frighteningly similar too,, Let me know. Best, |
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April 18, 2013, 10:13 |
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#5 |
Member
Ye Zhang
Join Date: Dec 2009
Location: Delft,Netherland
Posts: 92
Rep Power: 16 |
Hi, Catthan
What about your blade? is it 3D or 2D? I advice you to use C grid for the sharp trailing edge. This is a tutorial on youtube. http://www.youtube.com/watch?v=mgjRT4WY_iA and make sure to use a block for "boundary layer", that will be much better. just like this |
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April 18, 2013, 10:15 |
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#6 |
Member
Ye Zhang
Join Date: Dec 2009
Location: Delft,Netherland
Posts: 92
Rep Power: 16 |
this is the picture
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