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[GAMBIT] semi-circle meshing

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Old   March 24, 2010, 08:44
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Rúben Ramalhais
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Hello everybody

I need to mesh a semi-circle in GAMBIT 2.2.30 using only quad elements and mapped (can´t use PAVE because my UDF doesn´t work well with it).

Can anybody help my with the disposition of the vertex and edges to make it work? I know that I have to use 4 edged faces but using a square inside the circle isn`t helpful, at least by now.

Thaks for your help
Rúben Ramalhais (ruben_ramalhais@hotmail.com)
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Old   March 25, 2010, 03:06
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Quote:
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I know that I have to use 4 edged faces but using a square inside the circle isn`t helpful, at least by now.
why it is not helpful?
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Old   March 25, 2010, 06:24
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Hello,

Because I can mesh the square (face), but in the other faces GAMBIT complains about the number of elements, I´ve tried to alter the number of the edges elementes but still can´t mesh the other faces...

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Old   March 25, 2010, 07:47
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are the other faces mappable? (Gambit chooses automatically Map schema?)
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Old   March 25, 2010, 08:17
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No, the GAMBIT automatic options are elements:Quad; Type:tri primitive. But if I try to mesh with this option, an error mensage apear:

ERROR:number of intervals on meshed edges of face, does not allow mesching using de scheme of tri primitive.

If I use Type: map, GAMBIT mesh the face but with element quality value of 0.5, wich isn´t good because when I run FLUENT an error occurs due to mesh problems.
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Old   March 25, 2010, 09:05
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Quote:
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If I use Type: map, GAMBIT mesh the face but with element quality value of 0.5, wich isn´t good because when I run FLUENT an error occurs due to mesh problems.
Enforce Map, as you did.
Mesh Quality (skewness) of 0.5 is good.
I don't think the problem comes from that
Sans titre.png
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Old   March 25, 2010, 09:30
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Is incredible but my UDF works with perfectly regular elements (I´ve tried it with just a square) but when I use it with some distort elements allways occur an error in FLUENT such as AMG solver. I´ve tried it whithout my UDF and FLUENT runs well so it lead me to think that is not a mesh problem, is actually the interaction between my UDF and the mesh...

I´m going to use this mesh and see what happens!

Best regards, and thanks for you help
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