[ICEM] Penetrating elements

pizzaspinate · May 20, 2015, 06:25

Hi,

I am currently meshing a blended wing body in ICEM. I thought I have managed to mesh it successfully but when running checkMesh I get the following "penetrating elements" (see attached picture) at the wing tip trailing edge. I blocked as can be seen in the 2nd pic.
Any ideas how I can fix this problem?
Thank you in advance for any help

shereez234 · May 22, 2015, 06:53

can you post more pictures? I found it hard to see the penetrating elements

pizzaspinate · May 22, 2015, 07:51

sure. Hope this makes it clearer (in 3 are the penetrating elements)

shereez234 · May 22, 2015, 10:32

Quote:

Originally Posted by pizzaspinate

sure. Hope this makes it clearer (in 3 are the penetrating elements)

All assosciations done? and at the tip did you ogrid face? if you dont mind share a Solid view surface photo of wing)

pizzaspinate · May 26, 2015, 02:48

all associations done.
but im not sure if i blocked the tip correctly.

shereez234 · May 26, 2015, 03:42

Quote:

Originally Posted by pizzaspinate

all associations done.
but im not sure if i blocked the tip correctly.

The red surface I am seeing? Is it like a triangle shape surface? Is it blunt or sharp at the trailing edge? Did you try to "Y block" it? If you want some idea about Y blocking google search "Hexa meshing of wings- ICEM - turboengineer" it's a video by far (sijal).

When I mesh a wing - I split the wing into three horizontal blocks. Then at the tip of the wing I select ( O grid face for the block near the leading edge - leave the middle blocks and again for the trailing edge O grid face).

And I asked you to show a picture of your surface geometry hehe. So that I can give you an idea of how to block it if I am able to. Not the mesh or blocking. Haha.

Regards
Shereeez

pizzaspinate · May 26, 2015, 08:35

yes I did it the same way as you described with the O-Grid.
As i said i do not know how to handle the wing tip as it is not parallel to the other wing sections.

The trailing edges are sharp apart from the wing tip which is round.

uups I am sorry!

I am not sure what you mean then. Do you need pictures of the geometry when "surfaces" is toggled on under "Geometry"?
In case you mean that find them attached please

shereez234 · May 26, 2015, 08:54

You are still not getting me right! I would like to see a picture of solid prefarrably( not wireframe) view of tip of the wing!

Well see sample pictures of a wing tip like how I want it and see the blocking! are you using the same topology as this? I am not saying it's the best but give it a shot! and because you have sharp trailing edge may be you might need to collapse the o grid from behind the wing!

Okay here are the pictures

wingtip1.jpg

wingtip2.jpg

wingtip3.jpg

pizzaspinate · May 26, 2015, 09:55

hope this is any better

shereez234 · May 26, 2015, 12:13

I am trying to help here as much as I can and I would like to see other's incorporation as well from their experience. What I see missing here is that you did not O grid face of the blocks at the end of the wing. Do as follow

1) Go to split block - O grid block
2) Choose face - ( because I think you have already deleted the solid blocks inside the wing?)
3) click the faces that defines the tip of the wing surface ( round surface you see)
4) Adjust the vertices until the skew of elements exceeds 0.2 and above!

Hope this helps! ( Also can you refer to the blocking image I provided in the above post - picture 3 - last picture). It gave me quite high quality for the mesh!

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May 22, 2015, 06:53		#2
shereez234 Senior Member M Sereez Join Date: Jan 2014 Location: England Posts: 352 Blog Entries: 1 Rep Power: 13	can you post more pictures? I found it hard to see the penetrating elements

May 26, 2015, 08:54		#8
shereez234 Senior Member M Sereez Join Date: Jan 2014 Location: England Posts: 352 Blog Entries: 1 Rep Power: 13	You are still not getting me right! I would like to see a picture of solid prefarrably( not wireframe) view of tip of the wing! Well see sample pictures of a wing tip like how I want it and see the blocking! are you using the same topology as this? I am not saying it's the best but give it a shot! and because you have sharp trailing edge may be you might need to collapse the o grid from behind the wing! Okay here are the pictures wingtip1.jpg wingtip2.jpg wingtip3.jpg

May 26, 2015, 12:13		#10
shereez234 Senior Member M Sereez Join Date: Jan 2014 Location: England Posts: 352 Blog Entries: 1 Rep Power: 13	I am trying to help here as much as I can and I would like to see other's incorporation as well from their experience. What I see missing here is that you did not O grid face of the blocks at the end of the wing. Do as follow 1) Go to split block - O grid block 2) Choose face - ( because I think you have already deleted the solid blocks inside the wing?) 3) click the faces that defines the tip of the wing surface ( round surface you see) 4) Adjust the vertices until the skew of elements exceeds 0.2 and above! Hope this helps! ( Also can you refer to the blocking image I provided in the above post - picture 3 - last picture). It gave me quite high quality for the mesh!