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[ICEM] 3D Unstructured mesh

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Old   March 31, 2012, 09:14
Default 3D Unstructured mesh
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Hello everybody,
I need to mesh a 3D airfoil. I have tried with structured mesh and wish to try it using unstructured mesh. Can anyone please send some links of tutorials for this.
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Old   April 1, 2012, 01:17
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So you have already meshed 3D wing with hexa and now you want to have tetra/prism mesh?
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Old   April 1, 2012, 02:54
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Yes..I wish to compare the two meshes..
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Old   April 1, 2012, 04:32
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I have tried some crude meshes. When imported in Fluent, i see there exists non positive volume elements..Any guys have any idea of the reason. If not an idea to find the location of such an element..I also found out that, this error exists in both of my structured and unstructured meshes.
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Old   April 1, 2012, 04:34
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I have recently posted the meshes of 3D wing with 3 different methods and I get the quality around 0.6
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Old   April 1, 2012, 07:57
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i just read that particular thread..It was really helpful..

I have also attached my project for your reference. If you can just check the part where my wing span ends and fluid starts, you will find that mesh at the wing tip is criss crossed. Is the absence of Y blocks the reason for that?? Actually i am hearing Y blocks for the first time. If you can please tell me step by step for creating a y block it will be really helpful!! also kindly check for other possible errors at the interface of wing tip and fluid...

thanks a lot..
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File Type: zip 3d.zip (14.4 KB, 28 views)

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Old   April 1, 2012, 08:34
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Y block is option in Edit block : Edit block >>>>>> Set type and then drop down box select Y-block.

Made some vertex adjustments after Y-block.

You need to follow other steps to create the O-grid in the tip block as you read in this thread Structured Hexa Mesh on Wing

I am working to produce the youtube video.
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Old   April 1, 2012, 08:56
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Quarter O-grid from vertices and !!!!!! Why?


http://www.youtube.com/watch?v=92vSc...sMzS_aGxIys6E=
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Old   April 1, 2012, 09:08
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thanks a lot!!!i am still having a couple of problems..i am trying to figure them out on my own..So if i unable to solve them, i will contact you later during the night..

thanks again..
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Old   April 1, 2012, 09:18
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sure.

Anyone who has problems in ICEM or gambit (ANSYS meshing coming soon ) can contact me through forum or my email id by specifying the problem clearly and if possible attaching the geometry.I see it as an opportunity/chance to refine my skills.

I am also trying hard to upload the video on youtube so that things can be explained in few words and learned easily.
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Old   April 1, 2012, 09:44
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Please do tell me if create a you tube video corresponding to the thread "Structured Hexa Mesh on Wing"
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Old   April 3, 2012, 16:38
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Hi...
The mesh which you had sent in the zip file also displays "non positive volume element " exists..Just try to scale the mesh to mm and this will be displayed..
any ideas!!!!
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Old   April 3, 2012, 17:36
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Quote:
The mesh which you had sent in the zip file also displays "non positive volume element " exists..Just try to scale the mesh to mm and this will be displayed..
any ideas!!!!
I just showed you that how to deal the sharp trailing edge part with Y-blocking. Still more work is needed to get it working.
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Old   April 10, 2012, 07:58
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Hi Far,
I am actually having a tough time eliminating the negative volume..Is it possible for you to give a few tips about common errors..
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