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-   -   [ICEM] ICEM - Blocking stratergy for simple pipe (http://www.cfd-online.com/Forums/ansys-meshing/114597-icem-blocking-stratergy-simple-pipe.html)

hob March 13, 2013 18:37

ICEM - Blocking stratergy for simple pipe
 
3 Attachment(s)
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.

Far March 14, 2013 10:01

You are lucky
 
http://www.cfd-online.com/Forums/ans...osed-wing.html

hob March 16, 2013 07:04

2 Attachment(s)
Quote:

Originally Posted by Far (Post 413993)


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.

Far March 16, 2013 09:22

I see some error on one of the surfaces. Also you need to maker to one outer O-grid.

Far March 16, 2013 12:42

1 Attachment(s)
Here is the blocking for you :cool: 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 ;)

http://imageshack.us/a/img820/8413/rotsnakee.gif

Some images from attached blocking :

http://imageshack.us/a/img69/6388/simplechannel001.jpg http://imageshack.us/a/img22/5563/simplechannel004.jpg

http://imageshack.us/a/img171/4411/simplechannel003.jpg http://imageshack.us/a/img543/5193/simplechannel005.jpg

hob March 17, 2013 14:40

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!

Far March 17, 2013 14:43

Quote:

Originally Posted by hob (Post 414518)
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?

Far March 17, 2013 15:30

Quote:

Originally Posted by hob (Post 414518)
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 ?

hob March 17, 2013 16:59

Quote:

Originally Posted by Far (Post 414522)
Did you turn-off Solid ?

I think I did! How do you turn on/off solids?

Far March 17, 2013 17:35

It is on left side in parts. It was made when I changed material to solid.

Are you going to model heat transfer?

hob March 17, 2013 17:36

Quote:

Originally Posted by Far (Post 414539)
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.

Far March 17, 2013 17:50

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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