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-   -   Help: export 2-dim structure mesh from ICEM to CFX (http://www.cfd-online.com/Forums/cfx/24698-help-export-2-dim-structure-mesh-icem-cfx.html)

guest7777 October 22, 2007 01:55

Help: export 2-dim structure mesh from ICEM to CFX
 
hello, for a 2-dim structured mesh (with multi-blocking) i have following Element types : NODE, LINE_2 and QUAD_4 How to export the mesh to CFX? I tried the options in OUTPUT but ... With ANSYS CFX it seems one should convert into unstructured? I DONT want this. Thank you

Chirag October 22, 2007 06:59

Re: Help: export 2-dim structure mesh from ICEM to
 
No 2D business in CFX. It only handles 3D. So, not possible.

Glenn Horrocks October 22, 2007 07:03

Re: Help: export 2-dim structure mesh from ICEM to
 
Hi,

CFX cannot read 2D meshes. You need to extrude a 2D mesh for one element and put symmetry planes on top and bottom. This is explained in the documentation.

It is quite amazing that CFX does not support proper 2D simulations. While I realise it would be a re-write of the code this would have to be one the most requested features. I don't like the chances of it ever appearing - not until we get the software which supercedes CFX and Fluent and that's plenty of years off yet. We can but hope.

Regards, Glenn Horrocks

guest7777 October 22, 2007 07:43

Re: Help: export 2-dim structure mesh from ICEM to
 
thank you , which 'ELEMENT' Glenn ? I have a pre-mesh with QUAD_4 elements. How can i extrude the blocks? I am now making surfaces for each block and then associating face:surface. How to proceed? greetings

myron October 22, 2007 12:02

Re: Help: export 2-dim structure mesh from ICEM to
 
Once you have the pre-mesh use the Mesh > Extrude function. Select all elements and extrude one layer your desired thickness. Then you'll need to re-assign the new quad faces to appropriate parts for boundary conditions.

guest7777 October 22, 2007 16:54

Re: Help: export 2-dim structure mesh from ICEM to
 
The extrude button of MESH remians inactive: case: geometry with points and curves also in z direction and i have created surfaces for all parts (hell of a work)

i have the mesh for 2-dim case

as you kindly suggested: the EXTRUDE button of MESH remains inactive. I have structured hexa elements (QUAD_4)

thank you

nanoengine November 9, 2010 06:24

i have same problem guest7777
if anyone can solf our problem.
please post with screenshot.
best regard for you.

bharath November 10, 2010 11:38

the best way is extrude the geometry with some small thickness and make the 3d unstructured mesh by regular blocking.

playmaster November 11, 2010 12:05

Although we can write a 2D Finite Volume code, but the commercial code should cover the most general case.
for 2D modeling, I suggest Gambit, then import .msh file to CFX. If you are doing by means of ANSYS Mesh or ICEM, you should extrude your geometry as 1 element thickness (depending on your element size).


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