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[ICEM] Problems with export 2D mesh from ICEM to FLUENT |
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December 12, 2012, 18:04 |
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#21 |
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Simon Pereira
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It is usually better to split all the way rather than try to split only selected blocks... It keeps things less messy.
You can always merge blocks later if you need to clean it up. For the checking options, there may be a tutorial, but you really just need to look in the help to see what each one does.
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December 12, 2012, 18:15 |
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#22 |
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Francisco
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There's only something weird, when I'm connecting curves to edges, inlet and outlet curves seem to be somehow associated. I didn't care for that, but then in fluent I see that there's no inlet boundary, just to outlets! I've tried to fix that with no success... Any suggestions?
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December 12, 2012, 18:52 |
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#23 |
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Simon Pereira
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No idea, it worked properly for me.
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----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey |
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December 12, 2012, 18:55 |
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#24 | |
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Ghazlani M. Ali
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Quote:
i think this happens if you do association of multiple edge with multiple curve. You need to UNGROUP the curve then you will be able to associate each one of them |
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December 13, 2012, 03:49 |
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#25 |
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Francisco
Join Date: Mar 2012
Location: Spain
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I've managed to unrelate the curves and reassociate them. I've reassigned BC but in fluent Inlet boundary is still as outlet. I've also tried fixing the mesh again with no results. I can continue working with Simon's mesh, but I'd like to learn how to solve that issue. Anymore thing to try?
Thanks a lot guys! |
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December 13, 2012, 08:21 |
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#27 |
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Francisco
Join Date: Mar 2012
Location: Spain
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Well, I did all the steps Simon told me, and everything went fine untill I loaded the mesh in fluent. The problem is there is no inlet BC, just two outlet BCs. I checked it on Icem and everything was okay. That wasn't happening to Simon's mesh. I can upload the icem files in case you wanna check it out.
https://dl.dropbox.com/u/6986695/PS_12_12.rar |
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December 13, 2012, 12:48 |
Post # 10 & 12
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#28 |
Senior Member
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I am talking about the blocking issues at post # 10 and 12. Did you solve them or moved with new blocking as suggested by the Simon. Because I just took look on those files (post 12) and worked around half an hour and finally found the fault besides the blocking problems as described in detail by Simon. Wanna know the reason
PS: I have recorded all into one video clip too, where you can see my frustrution Last edited by Far; December 13, 2012 at 13:13. |
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December 13, 2012, 15:17 |
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#29 | |
Senior Member
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Quote:
There are lot of problems in the attached ICEM project as already mentioned by Simon. But i worked Ab_initio, I still got problem......... In which blocking you have the inlet problem? can you attach that? |
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December 13, 2012, 16:05 |
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#30 |
Senior Member
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Check this ....
https://dl.dropbox.com/u/68746918/ballogona.mp4 https://dl.dropbox.com/u/68746918/final.mp4 |
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December 14, 2012, 04:46 |
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#31 |
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Francisco
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All the problematic files are in the link I posted. I don't know which block was the one causing trouble. I'm sorry for your lost time.
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December 14, 2012, 05:33 |
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#32 | ||
Senior Member
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Quote:
Then the blocking issues were solved by Simon's six steps Quote:
Case A: (https://dl.dropbox.com/u/68746918/ballogona.mp4) 1. Started the blocking from scratch that is I did not use the six steps by Simon. Instead I went o create block > 2d planner block 2. Deleted the unwanted geometric entities such as internal curves and points. Also deleted the symmetry curves and recreated them. 3. Made the splits according to geometry. 4. Associated the all edge to appopriate curves and points to vertices. 5. Edge mesh parameters (roughly specified) 6. Pre-mesh and then unstructured mesh . 7. Solver selection and boundary condition specification as usual. 8. Mesh output and read into Fluent 9. Bingo error. No matching of nodes. Zero nodes. Non positive volume 10. repeated again and again..................... every time failure. 11 Finally went to boundary condition panel and deleted boundary conditions for the Fluid and interior. 12. Got the mesh working. Case B: (https://dl.dropbox.com/u/68746918/final.mp4) 1. Deleted boundary conditions, geometry parts and blocking. 2. recreated the some curves. 3. Initialized new blocking, made splits and associated 4. Edge mesh parameters, pre mesh and conversion to unstructured mesh. 5. solver selection, boundary conditions, and output mesh 6. Read in Fluent. Every thing went fine. PS: Your case had multiple injuries |
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December 14, 2012, 06:53 |
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#33 |
Senior Member
Francisco
Join Date: Mar 2012
Location: Spain
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Wow! Thanks a lot Far, people like you make CFD less cryptic!
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December 14, 2012, 07:32 |
Case 3 - same blocking and same geometry
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#34 |
Senior Member
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Here is the case - Minimum changes from original geometry and blocking. (https://dl.dropbox.com/u/68746918/case3.mp4)
Steps: 1. Start ICEM CFD 2. Load first tin and then blocking. 3. edge mesh parameter on the lower symmetry centre edge were set. Just changed scheme to uniform from geometric. 4. Used extend split > all edges. 5. Delete internal curves. Disassociate (remove association) the corresponding edges. 5. recompute pre-mesh, convert to unstructured meshing, boundary conditions (if needed) and output 2d meshing. 6. Read mesh in Fluent. |
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December 19, 2012, 08:07 |
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#35 |
Senior Member
Francisco
Join Date: Mar 2012
Location: Spain
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Hello again guys,
I've been trying a different mesh for the same case but I've encountered some trouble with my blocking edges. It seems that when more than 4 edges arrive to a vertex there are some extra edges collapsed into the corners which I cannot erase, in the attached picture the edge count is displayed, and there are some extra numbers in the corners.The desired blocks are also shown in a picture. I've tried to extend split and then merging nodes and erasing extra blocks but it didn't worked, and it messed everything up. How can I avoid that "collapsed" edges? Thanks! |
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December 19, 2012, 08:37 |
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#36 |
Senior Member
Francisco
Join Date: Mar 2012
Location: Spain
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I've also checked the faces of each blocks and there are some missing ones, I don't know why. In the picture blocks are pink and faces black.
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December 19, 2012, 10:34 |
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#37 |
Senior Member
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check out this ..........
http://www.youtube.com/watch?v=IuOCRmNyPQM http://www.youtube.com/watch?v=3bAKfxSL6Es |
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December 19, 2012, 17:05 |
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#38 |
Senior Member
Francisco
Join Date: Mar 2012
Location: Spain
Posts: 273
Rep Power: 15 |
Thanks Far, but I already did a mesh like the one in the videos. The problem isn't this specific mesh but how to solve this "collapsed" edges for any mesh.
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December 20, 2012, 04:06 |
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#40 |
Senior Member
Francisco
Join Date: Mar 2012
Location: Spain
Posts: 273
Rep Power: 15 |
Hi, vertex 61 is an example of the issue with the edge. I solved the case with a different blocking, but I'd like to know how to solve that. Thanks.
http://dl.dropbox.com/u/6986695/PS_2D_19_12.zip |
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batch mode, flat plate, fluent, icem |
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