# [ICEM] Blocking strategies for eight little holes

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March 22, 2012, 15:00
Blocking strategies for eight little holes
#1
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Ghazlani M. Ali
Join Date: May 2011
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hello everyone, i'm back again with my air intake
I managed to mesh the back part along with the inside of the air intake (picture 1), however i still need to deal with eight little holes shown in picture number 2.
I have a question: is there a simple way to take care of the eight holes on top of the block number 7 (picture 3). i guess the basic way to do that is to split the block 7 into eight small block, extrude and associate the edges ? is there another way ? just for trying i started by creating a new block (number 124 in the picture) that i will try to merge with number 7, is it possible to do that ? Thank you for you help in advance
Attached Images
 help1.jpg (96.8 KB, 38 views) help2.jpg (78.6 KB, 34 views) help3.jpg (97.2 KB, 36 views)
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Regards,
New to ICEM CFD, try this document --> https://goo.gl/NEbygB
Ali

March 22, 2012, 15:28
#2
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Sijal
Join Date: Mar 2009
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Quote:
 guess the basic way to do that is to split the block 7 into eight small block, extrude and associate the edges ?
That's the method, you have already figured it out. Use o block for each 7 holes (Edit: Apply O-block for eight holes). Check this out http://www.youtube.com/watch?v=KabKF...eature=related

Last edited by Far; March 23, 2012 at 02:25. Reason: wrong numbers

 March 22, 2012, 16:00 #3 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,314 Blog Entries: 6 Rep Power: 43 If you can attach the tin and blk (on forum or through pm), then I can suggest you something.

 March 23, 2012, 00:00 #4 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,314 Blog Entries: 6 Rep Power: 43 Main Command: Extrude along curve (provide appropriate face, one curve from starting surface to ending surface, end point of that curve). split should run across all blocks (vertically) for efficient use of o block

 March 24, 2012, 09:11 #5 Super Moderator     Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,366 Blog Entries: 23 Rep Power: 21 what i would have done to control to blocking is adding surfaces at the ends of each hole so that the premesh can appear beautiful. if i don't add surfaces, the faces of the top projects on the faces in the bottom making it very messy. when i add surface -> update blocking -> premesh , everything look fine. i'm sure that my association are corrects. did you get my problem ? __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/NEbygB Ali

March 24, 2012, 11:05
#6
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Sijal
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Quote:
 i'm sure that my association are corrects. did you get my problem ?
No, I didn't get the problem.

March 24, 2012, 11:47
#7
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Sijal
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Quote:
 what i would have done to control to blocking is adding surfaces at the ends of each hole so that the premesh can appear beautiful. if i don't add surfaces, the faces of the top projects on the faces in the bottom making it very messy. when i add surface -> update blocking -> premesh , everything look fine. i'm sure that my association are corrects. did you get my problem ?

Oh yes, You are 100% correct. I didn't check the premesh, just created blocking. So when turned on the premesh, I get the mess and after adding the ending surfaces mesh is OK as it should be.

I have observed another thing, that is the vertical edges of extruded blocks are not parallel to each other, however the edges on circle are parallel to all extruded blocks. I didn't understand this philosophy of blocking. Please note that I am talking about the when I turn on option of copy mesh parameters to all parallel edges.

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