CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   Gambit Meshing volume problem (http://www.cfd-online.com/Forums/fluent/45564-gambit-meshing-volume-problem.html)

haamdy July 31, 2007 07:14

Gambit Meshing volume problem
 
Hi every one,

I`m a new user of Gambit and I`ve a problem in meshing a cylinder, I made the mesh for the circular face and when I mesh the volume the mesh interval size is so small even if I change it it is still small, is there any one could help me.

hamdy

ritmat July 31, 2007 08:40

Re: Gambit Meshing volume problem
 
maybe you should mesh the edge first with size you want

AAA July 31, 2007 15:10

Re: Gambit Meshing volume problem
 
Hi

After meshing one face of the cylinder, use the Cooper scheme.

Regards


hamdy July 31, 2007 18:54

Re: Gambit Meshing volume problem
 
after I mesh the face I use Cooper scheme but the spacing in every time is the same as the spacing of the face even if I change it.

ritmat August 1, 2007 02:08

Re: Gambit Meshing volume problem
 
ignore size function if you use some

hamdy August 1, 2007 05:30

Re: Gambit Meshing volume problem
 
Thank you Dear Mr ritmat for your concern, but I don't use size function. I don't know why this happens but the interval size of the cooper scheme is always the same as the face mesh for every value I chose.

ritmat August 1, 2007 05:33

Re: Gambit Meshing volume problem
 
is it link to a lower mesh? show some pic of your whole geometry

AAA August 1, 2007 08:24

Re: Gambit Meshing volume problem
 
Hi

While using the cooper scheme, select the "Remove old mesh" option, and don't select the "remove lower mesh" option. Specify an interval size. I hope this works.

If you have a size function for that volume, select the "ignore size functions" option.

Regards

AAA


hamdy August 7, 2007 22:32

Re: Gambit Meshing volume problem
 
Dear all

I tried all what you said but no effect the proplem still.

may be if one of you can try to draw a grid for a pipe with diameter 15 and length 500 and tell me if he can control the interval size of the volume mesh at constant interval size of area.

AAA August 8, 2007 14:28

Re: Gambit Meshing volume problem
 
Hi

I think I know what the problem is. Considering a cylinder, you have three surfaces and only two edges representing the side circles. In order to control the interval size along the span of the cylinder, you need a line (edge) that you can mesh. No edge is created for the body of the cylinder, that's why you can't control the interval size on it.

Here is what you should do:

1) create the cylinder (it will only have two lines representing the side cirles (check it for your self). 2) create an edge between the two vortecies of the side circles and mesh it with the interval size you want. 3) mesh one circle (face). 4) use the cooper scheme to mesh the volume.

Please tell me if this works.

Regards

AAA

AAA August 8, 2007 14:34

Re: Gambit Meshing volume problem
 
Hi again

I forgot to tell you to split the face of the cylinder (the body) with the edge (virtual). This step come after step 2.

Sorry

Regards

AAA

hamdy August 10, 2007 08:39

Re: Gambit Meshing volume problem
 
Hi AAA

thank you very much, it works.


All times are GMT -4. The time now is 18:40.