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[GAMBIT] How to refine a mesh in a 3D cylinder |
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March 30, 2012, 20:15 |
How to refine a mesh in a 3D cylinder
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#1 |
New Member
Aziz
Join Date: Mar 2012
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Hello
How to refine my volume mesh into a cylinder ? |
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March 30, 2012, 22:46 |
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#2 |
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Sarang Dalne
Join Date: Oct 2010
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Can you give bit more detail as to what you are trying to do?
Thanks, Sarang |
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March 31, 2012, 02:55 |
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#3 |
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Aziz
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I have a pipe with a valve, and I would like to refine my mesh at the entrance and exit of the pipe and valve to gain more precision and computation time.
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March 31, 2012, 08:06 |
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#4 |
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banty
Join Date: Mar 2012
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before meshing the hole pipe and valve (Volume meshing), first u place more no of grid point on the edges near the entrance and exit and then mesh the volume.
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March 31, 2012, 11:05 |
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#5 |
Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
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If you are trying to refine the volume, you need to create a density box... This is one of the options under the mesh tab. If you create a density region from 2 points, it will create a cylinder. The radius of the cylinder is the mesh size you set times the width (number of elements of that size)...
Basically, a density box or density region is a way to locally control the max size in a volumetric region defined by points or entities. It only works with tetrahedral meshes and surface meshes created from them (such as patch independent octree surface mesh).
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March 31, 2012, 11:06 |
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#6 |
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Simon Pereira
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oops, sorry, you were asking about gambit. Ignore the last response, it was for ICEM CFD.
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March 31, 2012, 12:32 |
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#7 | |
New Member
Aziz
Join Date: Mar 2012
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Quote:
if we take only one cylinder, how to refine the mesh at the entrance? For your information, I create the cylinder and I draw a line between two points located on the faces of the input and output, then I refine my line and mesh them after i mesh my volume, but it doesn't work. |
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March 31, 2012, 12:33 |
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#8 |
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Aziz
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March 31, 2012, 15:15 |
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#9 |
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banty
Join Date: Mar 2012
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hopefully it will help u.plz see section Specifying the Grading Scheme
http://202.118.250.111:8080/fluent/G...ide/mg0302.htm |
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April 1, 2012, 09:00 |
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#10 |
New Member
Aziz
Join Date: Mar 2012
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Thank you, I found the solution.
Just refine the surface mesh of the pipe and also to refine the mesh of a plane that intersects the cylinder 2 and the end must be the volume mesh. |
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April 2, 2012, 01:18 |
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#11 |
Super Moderator
Maxime Perelli
Join Date: Mar 2009
Location: Switzerland
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use size functions...
http://my.fit.edu/itresources/manual...ommands_create
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April 20, 2012, 19:54 |
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#12 |
New Member
Aziz
Join Date: Mar 2012
Posts: 6
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Thank you for your answers, they were very helpful to me.
Banty thank you, your answer was the solution for me. |
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