[ICEM] Meshing prob at the surface joint

sakurabogoda · November 9, 2012, 02:09

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?

BrolY · November 9, 2012, 03:21

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

Far · November 9, 2012, 03:28

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.

sakurabogoda · November 9, 2012, 04:10

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.

sakurabogoda · November 9, 2012, 04:12

Dear Far,
Thanks for the hint. I'll try with it.

Far · November 9, 2012, 04:35

Quote:

Originally Posted by sakurabogoda

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.

BrolY · November 9, 2012, 04:48

https://securetransfer.ansys.com/bds...jbeilcchidej20

Far · November 9, 2012, 05:19

found it

https://docs.google.com/file/d/0ByIL...MjQ/edit?pli=1

sakurabogoda · November 11, 2012, 06:52

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?

sakurabogoda · November 11, 2012, 06:53

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?

Far · November 11, 2012, 06:56

can you show the pics from different angles?

sakurabogoda · November 11, 2012, 07:24

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.

Far · November 11, 2012, 11:24

Pics are not clear. There are two tangential pipes going into the larger dia pipe?

sakurabogoda · November 11, 2012, 21:11

Dear Far,
Yes, it has two tangential pipes joint. I have added more pics herewith. Still I cannot fix the solution.

sakurabogoda · November 11, 2012, 21:18

This is how ogrid generated around the block. it is around the block. Still I cannot fix this prob.

BrolY · November 12, 2012, 02:36

Associate first before doing the O-Grid and the extrude.

sakurabogoda · November 13, 2012, 04:59

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.

Aysiyi · November 13, 2012, 05:09

i think when you extrude face ,did you choose the inherit part name option ?

sakurabogoda · November 13, 2012, 05:21

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?

sakurabogoda · November 13, 2012, 05:24

Dear Aysisi,

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

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November 9, 2012, 03:21		#2
BrolY Senior Member AB Join Date: Sep 2009 Location: France Posts: 323 Rep Power: 21	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

November 9, 2012, 03:28		#3
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	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.

November 9, 2012, 04:10		#4
sakurabogoda Senior Member S.Bogoda Join Date: Jul 2012 Posts: 133 Rep Power: 13	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.

November 9, 2012, 04:12		#5
sakurabogoda Senior Member S.Bogoda Join Date: Jul 2012 Posts: 133 Rep Power: 13	Dear Far, Thanks for the hint. I'll try with it.

November 9, 2012, 04:48		#7
BrolY Senior Member AB Join Date: Sep 2009 Location: France Posts: 323 Rep Power: 21	https://securetransfer.ansys.com/bds...jbeilcchidej20

November 9, 2012, 05:19		#8
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	found it https://docs.google.com/file/d/0ByIL...MjQ/edit?pli=1

November 11, 2012, 06:52		#9
sakurabogoda Senior Member S.Bogoda Join Date: Jul 2012 Posts: 133 Rep Power: 13	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?

November 11, 2012, 06:53		#10
sakurabogoda Senior Member S.Bogoda Join Date: Jul 2012 Posts: 133 Rep Power: 13	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?

November 11, 2012, 06:56		#11
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	can you show the pics from different angles?

November 11, 2012, 11:24		#13
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	Pics are not clear. There are two tangential pipes going into the larger dia pipe?

November 12, 2012, 02:36		#16
BrolY Senior Member AB Join Date: Sep 2009 Location: France Posts: 323 Rep Power: 21	Associate first before doing the O-Grid and the extrude.

November 13, 2012, 04:59		#17
sakurabogoda Senior Member S.Bogoda Join Date: Jul 2012 Posts: 133 Rep Power: 13	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.

November 13, 2012, 05:09		#18
Aysiyi Member aysiyi Join Date: Nov 2012 Posts: 40 Rep Power: 13	i think when you extrude face ,did you choose the inherit part name option ?

November 13, 2012, 05:24		#20
sakurabogoda Senior Member S.Bogoda Join Date: Jul 2012 Posts: 133 Rep Power: 13	Dear Aysisi, There is no such an option in extrude faces. I used "Extrude alone a curve".