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[ANSYS Meshing] Mashing problem due to projections |
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December 14, 2016, 04:58 |
Mashing problem due to projections
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#1 |
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Antonio
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Hi all,
I am trying to deliver an assignment for my students but, all of them came up with this problem, even though they followed the correct procedure that gave me the precise result. This is the image that every body gets: Does anybody know what the problem could be? Thanks in advance for any help! |
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December 14, 2016, 06:09 |
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#2 | |
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December 14, 2016, 10:46 |
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#3 |
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Antonio
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Dear Sir,
I apologize if I did not provide enough details. I don't think there are telephats over there but people with a lot more experience than me. By the way, the geometry is structured as the following image can show( hopefully will be clearer than the previous one) In the middle of the domain there is a NACA0010 airfoil. I divided the domain using lines and projecting the lines on the surface. In this way I can obtain 10 edges and 6 faces.( With bolean operation I have subtracted the airfoil from the domain since I have created a single body) I inserted the edge sizing on each edge by number of division and I inserted the bias in order to obtain a structured mesh with a concentration of elements denser near the airfoil and less in the far field. The bias factor is 50 and the number of elements is 100 on each edge. I hope that this can help for the solution... |
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December 14, 2016, 13:41 |
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December 15, 2016, 00:04 |
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#5 |
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Antonio
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Thanks a lot for your support.I do appreciate.
I attach the .zip file which contains all the files. I hope it helps. |
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December 15, 2016, 02:30 |
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#6 |
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Zoom in on trailing edge and you'll see what is on image. I don't think this is how you want it to be.
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December 15, 2016, 02:43 |
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#7 |
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Antonio
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Definitely not. Thanks a lot. Is it possible that the meshing problems come from there?
Sent from my SM-G935F using CFD Online Forum mobile app |
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December 15, 2016, 03:42 |
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December 15, 2016, 10:51 |
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#9 |
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Antonio
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Sorry but I don't understand what you mean. The vertical line should be tangent to the leading edge therefore the angle is 90...can you explain me where is the mistake?
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December 15, 2016, 13:02 |
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December 15, 2016, 13:06 |
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#11 |
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Antonio
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So I should drag the vertical line precisely on the stagnation point?
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December 16, 2016, 03:06 |
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December 16, 2016, 06:31 |
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#13 |
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Antonio
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Thanks a lot!
I do appreciate your help. I will try to follow your method. I will post the meshing if it will come correctly |
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December 17, 2016, 03:49 |
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#14 | |
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Antonio
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After having tried for more than one day this is the final result. I am posting the entire project. I have used your method, this time on a NACA4420 airfoil. The quality is excellent except for one face which has not been meshed. I am not able to find the problem. I attach the image but I am not able to attach the entire project because .zip format is to big. |
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December 17, 2016, 04:18 |
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December 17, 2016, 04:32 |
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#16 | |
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http://www61.zippyshare.com/v/v2bWxmw8/file.html |
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December 17, 2016, 08:32 |
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#17 | |
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Also your airfoil has got blunt trailing edge (maybe as a result of geometry creation process) and topology that you use is not good for this, because of bad angles (see 2nd image). |
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December 17, 2016, 10:38 |
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#18 |
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Antonio
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I tried to follow your geometry with the horizontal line on the right. I'll split the face on the right with a ZX plane.
Regarding the blunt T.E. it came from NACA airfoils generator with a close trailing edge...What kind of topology should I use? Sent from my SM-G935F using CFD Online Forum mobile app |
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December 17, 2016, 11:35 |
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December 18, 2016, 03:56 |
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