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-   -   [ICEM] Etrude face (http://www.cfd-online.com/Forums/ansys-meshing/119714-etrude-face.html)

nabaen June 23, 2013 15:16

Etrude face
 
Hi,
How can I extrude the faces block of cylinder to frustum in cyclone?





http://uploadax.com/images/98969696507805661747.jpg

highhopes June 23, 2013 15:29

Hello nabaen,

It seems you have already selected 7 of 9 faces, and clicked "extrude faces" button. After that select "extrude along curve" in the "method" drop down menu. Then select all the 9 faces, and icem cfd will prompt you to select a curve. Then, select that line connecting the red points, which are located at the ends of the frustum. Finally, select the red point located at the narrow end of the frustum and apply. Hope this helps.

nabaen June 24, 2013 03:12

Quote:

Originally Posted by highhopes (Post 435478)
Hello nabaen,

It seems you have already selected 7 of 9 faces, and clicked "extrude faces" button. After that select "extrude along curve" in the "method" drop down menu. Then select all the 9 faces, and icem cfd will prompt you to select a curve. Then, select that line connecting the red points, which are located at the ends of the frustum. Finally, select the red point located at the narrow end of the frustum and apply. Hope this helps.

Thank you so much for your reply.As you said I select 9 faces (you can see at picture) .after that I select the curve that connects two centers and finally I select the the red vertex.But i receive fail warning.
would you please help me?http://uploadax.com/images/81639434591027456535.jpg

nabaen June 24, 2013 03:33

this is my ICEM file.would you please chek that it is posibble to extrude the blocks to frustum?https://hotfile.com/dl/230440335/013...clone.rar.html

highhopes June 24, 2013 16:49

Unfortunately, I cannot open the project file. Some attributes might be missing. About the geometry, are you sure the curve you select is cut at the point on the wide side of frustum? If not you can try segmenting it like this
Geometry tab->Create/Modify Curve->segment curve. Then select the curve, then select the point and apply. If you receive the same error message, then try extrude faces->interactive. Select the same faces, move your mouse and associate the edges and vertices to anywhere you want ont the narrow surface of the frustum.

diamondx June 24, 2013 20:30

extrude interactively then associate and move vertex

nabaen June 24, 2013 23:14

Thank you for your reply.
I received same message for interactive extrusion. "Extrusion of faces failed.:(

highhopes June 25, 2013 05:22

I think I can suggest that you do an extrusion using a simple geometry like a rectangular prism from scratch and maybe you'll notice what is wrong. Or you can simply associate and move the edges and the vertices at the wide surface of the frustum to the other end and go with only slicing the blocks without extruding them.

Far June 25, 2013 06:26

1 Attachment(s)
I tried on your geometry and extrude along curve is not working. So i used simple extrude command (fixed distance and it is working)

blocking is also attached. Although some problems are still there, but blocking is complete

Far June 25, 2013 10:36

Quote:

Originally Posted by diamondx (Post 435708)
extrude interactively then associate and move vertex

Ali I have never been able to use "extrude interactively" function. do you know how to do it ?

diamondx June 25, 2013 10:37

keep pressing on the middle mouse button...

Far June 26, 2013 06:18

yeah, it works

nabaen July 9, 2013 13:57

Dear all,
I am a beginner in Icem.Please help me for meshing the cyclone.I could make a block for cyclone using your advice.as you can see in the picture.Now I have problem for making mesh.when I mark "pre-mesh" a few line only appears in geometry.would you please advise me for steps of meshing?



http://upload.tehran98.com/img1/10jo...f5w7zhqlhx.png

nabaen August 19, 2013 10:51

2 Attachment(s)
Quote:

Originally Posted by Far (Post 435792)
I tried on your geometry and extrude along curve is not working. So i used simple extrude command (fixed distance and it is working)

blocking is also attached. Although some problems are still there, but blocking is complete

I have been involved with this cyclone a long time.:p
Some bad meshes are in the inlet as you can see in the attached picture.
So I tried to use your blocking strategy for this part.But it doesn't work.Would you please help me to improve this part.
Thanks a lot.

Far August 19, 2013 11:00

i dont think you can get rid of this problem without doing any one of the following:

1. change geometry or

2. use unstructured mesh in that region

nabaen August 19, 2013 11:04

Quote:

Originally Posted by Far (Post 446663)
i dont think you can get rid of this problem without doing any one of the following:

1. change geometry or

2. use unstructured mesh in that region

Thanks a lot.
But your mesh is better than mine.
How is it possible to use unstructured mesh in this part?
Then output to fluent will be different ?Should I use multi block?

Far August 19, 2013 11:13

You have to make the tetra and hexa meshes and merge them.

diamondx August 19, 2013 11:56

My signature will bring you to a small documentation you can read about how to merge tetra and hexa if you ever decide to do that.
There is also this interesting youtube video on how to mesh a cyclone http://www.youtube.com/watch?v=KabKFrJK3fM


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