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[ICEM] Meshing prob at the surface joint

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Old   November 9, 2012, 03:09
Default Meshing prob at the surface joint
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Dear All,

I am trying to mesh a geometry by hexa grids in ICEM CFD. The problem happens in the connection of two cylinders.

There is an extended mesh in the connections.

(Please refer the attache files for the image views of connection, blocking and pre mesh)

Can any body help me to fix this problem?
Attached Images
File Type: bmp Geo.bmp (45.1 KB, 36 views)
File Type: bmp Geo_Blocking.bmp (42.2 KB, 26 views)
File Type: bmp Geo_Premesh.bmp (44.6 KB, 18 views)
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Old   November 9, 2012, 04:21
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This has already be solved before. If you make a quick research, you should be able to find the link to this file "ICEMCFD_Tips&Tricks2010.pdf" made by Simon. Everything is explained in this document
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Old   November 9, 2012, 04:28
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create blocking for the bigger pipe including ogrid. Then create the blocking by extrude along curve. There are many other methods to blocks including first creating the one big block for both pipes. Just try.
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Old   November 9, 2012, 05:10
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Dear Boles,

I could find some presentations by Simon. But those cannot be downloaded. Can you please give me the exact link. I found this link,
ftp://ftp.ansys.com/outgoing/simon/ICEM_Tips2008.pdf
but cannot load the page.
Thank a lot for your help.

Sakura.
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Old   November 9, 2012, 05:12
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Dear Far,
Thanks for the hint. I'll try with it.
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Old   November 9, 2012, 05:35
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Quote:
Originally Posted by sakurabogoda View Post
Dear Boles,

I could find some presentations by Simon. But those cannot be downloaded. Can you please give me the exact link. I found this link,
ftp://ftp.ansys.com/outgoing/simon/ICEM_Tips2008.pdf
but cannot load the page.
Thank a lot for your help.

Sakura.
Simon told that ftp is closed permanently. Look for http link.
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Old   November 9, 2012, 05:48
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https://securetransfer.ansys.com/bds...jbeilcchidej20
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Old   November 9, 2012, 06:19
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found it

https://docs.google.com/file/d/0ByIL...MjQ/edit?pli=1
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Old   November 11, 2012, 07:52
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Dear All, Thanks a lot for supports.

There is another prob with o grid generation.

01. First I blocked vertical cylinder, rotated it 30 degrees around Y axis and generated an o grid in it.
02. then, extruded the surface in to horizontal cylinder and split that block.
03. generated an o grid there. The problem occurred here.

Prob: When I created the o grid inside the extruded section, the o grid generate, but out side from the block. I haven't select "Around blocks"

Can anybody answer me why this is happening?
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Old   November 11, 2012, 07:53
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Dear All, Thanks a lot for supports.

There is another prob with o grid generation.

01. First I blocked vertical cylinder, rotated it 30 degrees around Y axis and generated an o grid in it.
02. then, extruded the surface in to horizontal cylinder and split that block.
03. generated an o grid there. The problem occurred here.

Prob: When I created the o grid inside the extruded section, the o grid generate, but out side from the block. I haven't select "Around blocks"

Can anybody answer me why this is happening?
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Old   November 11, 2012, 07:56
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can you show the pics from different angles?
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Old   November 11, 2012, 08:24
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Dear Far,
Thank you so much for this immediate reply. I have attached all figures as steps I followed from jPEGs named ogrid0 to ogrid4.

Thanks again.
Attached Images
File Type: jpg ogrid0.jpg (7.9 KB, 11 views)
File Type: jpg ogrid1.jpg (10.7 KB, 9 views)
File Type: jpg ogird2.jpg (10.6 KB, 9 views)
File Type: jpg ogrid3.jpg (10.9 KB, 7 views)
File Type: jpg ogrid4.jpg (11.3 KB, 9 views)
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Old   November 11, 2012, 12:24
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Pics are not clear. There are two tangential pipes going into the larger dia pipe?
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Old   November 11, 2012, 22:11
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Dear Far,
Yes, it has two tangential pipes joint. I have added more pics herewith. Still I cannot fix the solution.
Attached Images
File Type: jpg curves.jpg (32.0 KB, 5 views)
File Type: jpg geo.jpg (32.0 KB, 10 views)
File Type: jpg joint.jpg (32.0 KB, 9 views)
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Old   November 11, 2012, 22:18
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This is how ogrid generated around the block. it is around the block. Still I cannot fix this prob.
Attached Images
File Type: jpg ogrid4.jpg (64.0 KB, 7 views)
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Old   November 12, 2012, 03:36
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Associate first before doing the O-Grid and the extrude.
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Old   November 13, 2012, 05:59
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Finally I could fix it. It happens in split blocking and then extrusion. If the whole face extruded and then split it, ogrid generates inside the block. But I don't know what is the reason.

But thank you so much for your helps.
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Old   November 13, 2012, 06:09
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i think when you extrude face ,did you choose the inherit part name option ?
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Old   November 13, 2012, 06:21
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Dear All,

I got a problem again. It is not relates to ogrid.

When I do the meshing, unwanted mesh extension generates from the cylinder top to bottom cone top curve. Pls refer the pics attached.

Can anybody help me?
Attached Images
File Type: jpg pic 1.jpg (96.0 KB, 9 views)
File Type: jpg pic 2.jpg (96.0 KB, 9 views)
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Old   November 13, 2012, 06:24
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Dear Aysisi,

There is no such an option in extrude faces. I used "Extrude alone a curve".
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