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-   -   [ANSYS Meshing] Multiple errors in ICEM and FLUENT (http://www.cfd-online.com/Forums/ansys-meshing/104268-multiple-errors-icem-fluent.html)

Evil Teyen July 5, 2012 12:16

Multiple errors in ICEM and FLUENT
 
Hi all- I am trying to mesh a system of ducts (16mm x 1.4mm cross section) wrapped around a hot power source (250x250x370mm) in ICEM for use in Fluent. Numerous issues, this code is horrible- I even emailed ANSYS to tell them so and a man phoned me to say it was maybe "too high end" for what I was doing. Anyway. To the problems:

Firstly the auto-meshing option kept making an atrocious mess regardless of the settings, so after wasting a week I discovered the manual mesh building tools. I am now trying to build a single length/corner piece of ducting- it exports fine, but it causes FLUENT to throw an "ACCESS_VIOLATION" error on import. If I try to run the mesh checker it finds a variety of uncovered faces in both fluid and solid parts of the mesh, so I can't just add them arbitrarily to a new part with a defined boundary condition, but FLUENT seems to fix these before it crashes anyway- it also thinks that certain volume elements are incorrectly oriented (how I have no idea, as it created them itself- surely it should have known not to mis-orient them?) and if I click "fix" it bends them all out of shape, thus ruining the mesh. What can I do, beyond just cutting my losses (2 weeks of a ten week project so far) and re-starting in another meshing tool?

Cheers.

diamondx July 5, 2012 13:26

relax...;) can you share pictures, icem files ?

Far July 5, 2012 15:20

Quote:

Originally Posted by Evil Teyen (Post 369956)
Hi all- I am trying to mesh a system of ducts (16mm x 1.4mm cross section) wrapped around a hot power source (250x250x370mm) in ICEM for use in Fluent. Numerous issues, this code is horrible- I even emailed ANSYS to tell them so and a man phoned me to say it was maybe "too high end" for what I was doing.

I can understand ur feelings:p. Can you share some details so that we can help you out.

Evil Teyen July 9, 2012 11:01

5 Attachment(s)
Many thanks for the encouragement all! I do have images and ICEM files, however I have now re-started in Design Modeller. I have ten sub-channels in each duct:
Attachment 14305
and at least one length / bend will mesh in DM:
Attachment 14304
however, of the geometry for one complete loop (of 24 I shall eventually need):
Attachment 14301
only one channel will mesh:
Attachment 14303
and, besides telling me I have misoriented faces on the other 9 channels, which were created in exactly the same fashion as the one which will mesh (via the successive boolean union of subsections), I just got this phenomenally useful error message from MS visual C++:
Attachment 14302
which is fairly amusing in itself..

Update: managed to get the whole loop to mesh, about to run a sim on it :)

Evil Teyen July 9, 2012 11:17

3 Attachment(s)
Quote:

Originally Posted by diamondx (Post 369964)
relax...;) can you share pictures, icem files ?

Fluid channels:
Attachment 14306
in solid duct:
Attachment 14309
and the former after corruption by ICEM:
Attachment 14308.

I may yet have to go back to ICEM to build a manifold the geometry for which I can't currently see a way to creating in DM.


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