[ICEM] Meshing pipe with different diameters

Axlex · April 25, 2013, 10:37

AT LAST!!! This was a difficult birth like we say here.

I almost got the working steps from the pictures, but this took some time. The explanations were helpful.

I still don't get the difference, but thats ok. I will repeat that for different geometries and then i hopefully understand it.

Thanks for the kind help.

BrolY · April 25, 2013, 10:45

From what I understood, your mistake was to associate the o-grid you created in block 1 and 3 and associated the edges of those o-grids with the curves of the small tube. Because before that, you already associated the edges of the o-grid of bloc2 with the curves of the small tube.
So you have 2 edges for 1 curve, which is wrong. It created a 0-volume at the junction of the tubes.

I hope my explanations were clear ...

Axlex · April 26, 2013, 04:18

OK, i think i understand it now.

Thanks for the help!

Far · April 26, 2013, 04:32

Quote:

Originally Posted by BrolY

From what I understood, your mistake was to associate the o-grid you created in block 1 and 3 and associated the edges of those o-grids with the curves of the small tube. Because before that, you already associated the edges of the o-grid of bloc2 with the curves of the small tube.
So you have 2 edges for 1 curve, which is wrong. It created a 0-volume at the junction of the tubes.

I hope my explanations were clear ...

In addition to that there were duplicate blocks as well. Once I merge them and made the inner edges black (surface associated edges) problem was solved.

kyaj001 · June 10, 2014, 19:13

hi there, im trying to mesh a geometry very similar to this, the only difference being that the central pipe section is very short and behaves like an orifice. The steps are very clear in this post but could someone please further clarify step 6 please.
thanks in advance

Tanjina · January 25, 2015, 19:25

Hello, is it possible to do this grid on workbench mesher?

Regards,
Tanjina

FJSJ · January 27, 2015, 16:49

Hi Tanjina,

I think you could try to do it but you need to split your geometry to get parts as O-grid topology approach. Take a look at this thread:

[ANSYS Meshing] Problem with structured meshing pipe elbow

Tanjina · January 29, 2015, 17:10

Thanks ! I am trying..... but it seems I have some problem.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[ICEM] Simple pipe meshing - problems with y+ in CFX	Keizers	ANSYS Meshing & Geometry	23	January 15, 2015 08:00
[GAMBIT] GAMBIT Meshing of Pipe with Holes Perpendiculer to Flow Stream	rocketman1151	ANSYS Meshing & Geometry	7	November 30, 2011 02:39
[GAMBIT] Meshing a pipe	vedravi	ANSYS Meshing & Geometry	1	March 25, 2010 13:19
Terrible Mistake In Fluid Dynamics History	Abhi	Main CFD Forum	12	July 8, 2002 09:11
fluid flow fundas	ram	Main CFD Forum	5	June 17, 2000 21:31

April 25, 2013, 10:37		#21
Axlex New Member Robert Join Date: Apr 2013 Posts: 24 Rep Power: 13	AT LAST!!! This was a difficult birth like we say here. I almost got the working steps from the pictures, but this took some time. The explanations were helpful. I still don't get the difference, but thats ok. I will repeat that for different geometries and then i hopefully understand it. Thanks for the kind help.

April 25, 2013, 10:45		#22
BrolY Senior Member AB Join Date: Sep 2009 Location: France Posts: 323 Rep Power: 21	From what I understood, your mistake was to associate the o-grid you created in block 1 and 3 and associated the edges of those o-grids with the curves of the small tube. Because before that, you already associated the edges of the o-grid of bloc2 with the curves of the small tube. So you have 2 edges for 1 curve, which is wrong. It created a 0-volume at the junction of the tubes. I hope my explanations were clear ...

April 26, 2013, 04:18		#23
Axlex New Member Robert Join Date: Apr 2013 Posts: 24 Rep Power: 13	OK, i think i understand it now. Thanks for the help!

June 10, 2014, 19:13		#25
kyaj001 New Member Kartik Join Date: Apr 2014 Posts: 3 Rep Power: 12	hi there, im trying to mesh a geometry very similar to this, the only difference being that the central pipe section is very short and behaves like an orifice. The steps are very clear in this post but could someone please further clarify step 6 please. thanks in advance

January 25, 2015, 19:25		#26
Tanjina Senior Member Tanjina Afrin Join Date: May 2013 Location: South Carolina Posts: 169 Rep Power: 12	Hello, is it possible to do this grid on workbench mesher? Regards, Tanjina

January 27, 2015, 16:49		#27
FJSJ Senior Member Javi Join Date: Jan 2013 Posts: 276 Rep Power: 16	Hi Tanjina, I think you could try to do it but you need to split your geometry to get parts as O-grid topology approach. Take a look at this thread: [ANSYS Meshing] Problem with structured meshing pipe elbow

January 29, 2015, 17:10		#28
Tanjina Senior Member Tanjina Afrin Join Date: May 2013 Location: South Carolina Posts: 169 Rep Power: 12	Thanks ! I am trying..... but it seems I have some problem.