[GAMBIT] semi-circle meshing

Ramalhais · March 24, 2010, 07:44

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)

-mAx- · March 25, 2010, 02:06

Quote:

Originally Posted by Ramalhais

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?

Ramalhais · March 25, 2010, 05:24

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...

Ramalhais

-mAx- · March 25, 2010, 06:47

are the other faces mappable? (Gambit chooses automatically Map schema?)

Ramalhais · March 25, 2010, 07:17

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.

-mAx- · March 25, 2010, 08:05

Quote:

Originally Posted by Ramalhais

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

Ramalhais · March 25, 2010, 08:30

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
Ramalhais

March 24, 2010, 07:44	semi-circle meshing	#1
Ramalhais New Member Rúben Ramalhais Join Date: Feb 2010 Location: Portugal Posts: 5 Rep Power: 16	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)

March 25, 2010, 06:47		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	are the other faces mappable? (Gambit chooses automatically Map schema?) __________________ In memory of my friend Hervé: CFD engineer & freerider

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March 25, 2010, 05:24		#3
Ramalhais New Member Rúben Ramalhais Join Date: Feb 2010 Location: Portugal Posts: 5 Rep Power: 16	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... Ramalhais

March 25, 2010, 07:17		#5
Ramalhais New Member Rúben Ramalhais Join Date: Feb 2010 Location: Portugal Posts: 5 Rep Power: 16	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.

March 25, 2010, 08:30		#7
Ramalhais New Member Rúben Ramalhais Join Date: Feb 2010 Location: Portugal Posts: 5 Rep Power: 16	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 Ramalhais