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-   -   [ICEM] A simple question about length unit (http://www.cfd-online.com/Forums/ansys-meshing/105277-simple-question-about-length-unit.html)

lnk July 26, 2012 14:20

A simple question about length unit
 
Hi everyone,

Here is the question. I designed my geometry in ICEM. I never specified the length unit. When i import the mesh to CFX, the length unit is defined automatically to meter which makes my geometry too large to have the correct simulation results. (My pipe is 4 cm long but it makes it 40 meters. So the pressure drop result doesn't make any sense. )May I ask how to set my geometry to the correct size without redoing it?

Best regards,
lnk

flotus1 July 27, 2012 04:23

When writing the mesh in ICEM, you can apply a scaling factor.

If you forgot to do so, you can still scale the mesh in CFX.

lnk July 27, 2012 04:26

Quote:

Originally Posted by flotus1 (Post 373863)
When writing the mesh in ICEM, you can apply a scaling factor.

If you forgot to do so, you can still scale the mesh in CFX.

Thank you very much. May I ask how to scale it at CFX?

Best,
lnk

BrolY July 27, 2012 04:27

ICEM is unitless. Simon already explained that in this forum, you should make a research.

But as Flotus said, you can scale your mesh when you export, or scale your geometry when you import it.

flotus1 July 27, 2012 04:33

Right click on the imported mesh, choose "transform mesh" and select "scale" as the type of transformation. Isn't this in the manual?

lnk July 27, 2012 04:34

Quote:

Originally Posted by BrolY (Post 373866)
ICEM is unitless. Simon already explained that in this forum, you should make a research.

But as Flotus said, you can scale your mesh when you export, or scale your geometry when you import it.


But I can't scale it any more after I already imported the mesh, right?

Best,
lnk

flotus1 July 27, 2012 04:45

Sure you can. See my last post.

lnk July 27, 2012 05:01

Quote:

Originally Posted by flotus1 (Post 373875)
Sure you can. See my last post.


Thank you very much, Flotus and BrolY. I searched 'length unit' at the 'help CFX-pre' but didn't find the answer for that. Now the problem is solved. Thanks!


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