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[GAMBIT] Draw Secondary Air Inlets on wall

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Old   December 15, 2014, 17:46
Question Draw Secondary Air Inlets on wall
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Greetings everyone

Iím a new comer to the world of CFD.


Currently Iím working on a grate Incinerator.

An over-simplified model is given in the following figure.





By looking at the work done by others, I found that they didnít include the whole tubes in the secondary Inlet of their models (the over fire air) they just included the end of these tubes.
This allows them, I think, to choose in Fluent the angle at wish the air enters (For automation purposes).


My question is how would you place one of these circles (faces) on the walls (either through GUI or TUI)?
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Old   December 16, 2014, 03:39
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do you have the dbs file (Gambit)
Else your geometry isn't quite complicated, and you can build it from scratch
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Old   December 16, 2014, 05:53
Default Thank you :)
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Thank you for your reply Maxime
Yes, the geometry is simple.
Even with the real model, drawing the walls is easy.
My only problem was with placing the circles on the walls specially since there are dozens of them in the real model. But I think I have a solution.
It's not perfect, but it works. I'll be grateful if you could suggest something simpler.
I included the .dbs and the .jou in the .zip file.



.
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Old   December 16, 2014, 05:55
Default My solution is:
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1- I draw a circle (face) with the desired radius
2- I add a point in the middle of the circle and another on the edge (using place a vertex on surface /u-v values/)
3- I add a vertex to the wall on wish I want to place the circle.
4- I use align to transport the circle to the surface
- the vertex in the centre of circle and the vertex on the wall used for translation
- the other two vertexes on the circle will be used for rotation and alignment with two vertexes on walls (the corners for example)
5- I remove the vertexes I added
6- Split the wall with the circle
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Old   December 16, 2014, 05:57
Default In text commands(from the .jou file):
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face create radius 0.2 xyplane circle

vertex create onface "face.9" uparameter 0 vparameter 0
vertex create onface "face.9" uparameter 0 vparameter -0.19938949

vertex create onface "face.5" uparameter 0 vparameter 0

face align "face.9" translation "vertex.14" "vertex.16" rotation1 "vertex.13" \
"vertex.4" rotation2 "vertex.15" "vertex.10"

vertex delete "vertex.16" "vertex.15" "vertex.14
"
face split "face.5" connected faces "face.9"
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Old   December 16, 2014, 10:24
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yep, it is the way to achieve what you want
Now on your geometry you can even afford you to mesh your geometry with full hexa
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