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[ICEM] ICEM - Blocking stratergy for simple pipe

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Old   March 13, 2013, 18:37
Default ICEM - Blocking stratergy for simple pipe
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hob
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Hi all,

I am attempting a structured mesh in ICEM for a simple pipe (parabola with a flat base).

I however cannot get the mesh between surfaces correct (second picture), are there any tutorials for pipe flow with external and internal meshes? (if that makes sense!)

Also I was generating the mesh on the pipe by deleting blocks (between internal and external surface) and associating edges to surface, I haven't merged any verticies and am stuck with how to map the top.
Attached Images
File Type: png blocking.PNG (32.5 KB, 21 views)
File Type: jpg blocking2.jpg (56.8 KB, 23 views)
File Type: png blocking3.PNG (51.8 KB, 22 views)
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Old   March 14, 2013, 10:01
Post You are lucky
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Meshing of a closed wing
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Old   March 16, 2013, 07:04
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Quote:
Originally Posted by Far View Post

Many thanks Far,

I have attempted (a lot of times!) using o-grid (half and full) hoever I get a similar error each time (volume error) but the volumes appear to be ok (fluent confirms the error though.) I am not sure where I am going wrong with blocking.
Attached Images
File Type: png blocking error.PNG (38.6 KB, 7 views)
Attached Files
File Type: zip simple_channel.zip (21.9 KB, 3 views)
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Old   March 16, 2013, 09:22
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I see some error on one of the surfaces. Also you need to maker to one outer O-grid.
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Old   March 16, 2013, 12:42
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Here is the blocking for you Some adjustments in edge sizing is required. Also move some vertices to make the quality better.

Do you feel like this while working with ICEM Hexa



Some images from attached blocking :



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File Type: zip simple_channel_Final.zip (34.7 KB, 6 views)
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Old   March 17, 2013, 14:40
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Many thanks Far!

I had a look at the mesh and it looks good, I still get volume errors though. I am starting to think it is impossible not to get them!
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Old   March 17, 2013, 14:43
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Quote:
Originally Posted by hob View Post
Many thanks Far!

I had a look at the mesh and it looks good, I still get volume errors though. I am starting to think it is impossible not to get them!
volume errors like?
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Old   March 17, 2013, 15:30
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Quote:
Originally Posted by hob View Post
Many thanks Far!

I had a look at the mesh and it looks good, I still get volume errors though. I am starting to think it is impossible not to get them!
Did you turn-off Solid ?
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Old   March 17, 2013, 16:59
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Did you turn-off Solid ?
I think I did! How do you turn on/off solids?
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Old   March 17, 2013, 17:35
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It is on left side in parts. It was made when I changed material to solid.

Are you going to model heat transfer?
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Old   March 17, 2013, 17:36
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Quote:
Originally Posted by Far View Post
It is on left side in parts. It was made when I changed material to solid.

Are you going to model heat transfer?

Many thanks! Do you need to create solids rather than deleting blocks? and yes it will be for heat transfer in fluent.
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Old   March 17, 2013, 17:50
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Both methods are same. But I am comfortable with "solid" method as it helps in making O-grid.

I checked mesh in Fluent and no negative volume is there.
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