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[ICEM] How to build the mesh for 3 injection area within one surface?

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Old   April 2, 2012, 11:58
Question How to build the mesh for 3 injection area within one surface?
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Dear ICEM experts,
I'm trying to build mesh for the burner with 3 injection area in ICEM, the 3 different injection area are in the same surface and shown in the following pictures. There are no further inside structre of it.
Could anyone tell me how to build the block for it or give a hint?
I also attach the file Question_3injection.zip

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File Type: zip upload.zip (43.6 KB, 11 views)
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Old   April 2, 2012, 12:49
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you will mesh the cylinder like normal. nothing really special. then create three different parts (surfaces) so fluent can recognize them as ddifferent boundaries.
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New to ICEM CFD, try this document --> http://goo.gl/G2gkE
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Old   April 3, 2012, 05:06
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Quote:
Originally Posted by diamondx View Post
you will mesh the cylinder like normal. nothing really special. then create three different parts (surfaces) so fluent can recognize them as ddifferent boundaries.
Hi, Ali, thanks for your reply. I've tried as you said, but fluent only recognize the 1st and 3rd inlet area, and the surface mesh look like the following pic(I've already set 3 different inlet in ICEM)
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Old   April 3, 2012, 08:51
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here is the little effort made by me. I checked them in fluent and every thing is fine.

I am also uploading 3 parts video on youtube and shall post links in next post.






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File Type: zip 3injections.zip (52.6 KB, 10 views)

Last edited by Far; April 3, 2012 at 13:12.
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Old   April 3, 2012, 13:04
Default Video clips - Youtube
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Part I

http://www.youtube.com/watch?v=9Ojpf...feature=relmfu

Part II

http://www.youtube.com/watch?v=56mEO...ature=youtu.be

Part III

http://www.youtube.com/watch?v=Ai64o...feature=relmfu
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Old   April 4, 2012, 01:44
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You forgot to associate small curve. So internal block was distort and you set the length of edges to 1.
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Old   April 4, 2012, 04:59
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Ah, some small adjustments are still needed. My primary aim was to clarify the process of creating the o-block and getting different inlets with different boundary conditions in Fluent (Obviously learned from Simon the great Boundary conditions problem in ICEM and Fluent)

If needed I can rectify these problems and upload new tin and blk files.
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Old   April 4, 2012, 06:21
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thanks, everyone, especially Far. I've build the mesh under Far's instruction, and it turned to be very cool.
The video didn't just help me with this case, but also give me many inspiration about the similar problems. I think it's very good for a beginner like me.
By the way, Dear Far, I'm not sure which small adjustments you mentioned, is it important? the quality of mesh I built following your method are all over 0.5, is that OK?
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Old   April 4, 2012, 06:30
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Actually Ralen is referring to video where the inner most blocks was adjusted. Also he is referring to wrong edge-curve association, which was later corrected in part II (Or part I, I am not sure which part but it is done)

Quote:
Ah, some small adjustments are still needed
On the other side of cylinder (opposite to injector) I didn't link the edge to opposite side edges, by this we may get even better quality.

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the quality of mesh I built following your method are all over 0.5, is that OK?
This is good quality, but still can be improved as discussed above.
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Old   April 4, 2012, 07:43
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thanks again,Far ! I'll pay attention on the place you mentioned!
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Old   April 8, 2012, 14:04
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I have found one mistake in part I at 3:11 where I have associated four edges to two curves and in reality there were three curves (one is very small).
http://www.youtube.com/watch?v=9Ojpf...IQ-kXxV6OcHws=
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Old   April 8, 2012, 14:20
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Quote:
You forgot to associate small curve. So internal block was distort and you set the length of edges to 1.
@Ralen : I apologise that I didn't understand your comment. You are correct . Thats why inner block was distorted. Thanks
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