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April 14, 2018, 04:50 |
Gmsh 3.0 - Boundary layer 3D mesh
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#1 |
New Member
Paul Bertrand
Join Date: Apr 2018
Location: France
Posts: 8
Rep Power: 8 |
Dear all,
I just begin to use Gmsh and I have some problems with the last version. I searched some solutions on forums or in the documentation but I still have some problems : I am trying to use Gmsh to mesh 3D models by taking into account the boundary layer. My 3D model is from a .STP file and I tried to use the GUI to generate meshes. I have no problems to generate 3D meshes which are well exported to OpenFoam. Now, I want ton add some prisms layers at walls to take into account the boundary layer. I followed all the information that I've found on forums or documentation but it seems that nothing happens when I use Mesh -> Define -> Size Fields -> New -> Boundary Layer (with the GUI). I have no errors in the dialog window below, but I have no changes in the mesh... I think the reason is that I don't fill the fields with good information, especially about EdgesList and NodesList ?? I try to apply layers of prisms on surfaces (as I have a 3D model...) and I am not sure what is expected in these fields (and what is the format (1, 2, ... ?). I have noticed the values of each surface but I don't know how to input them in the fields... My questions : - Is there a good tutorial for Gmsh and is there a method described with tutorials or examples about how to do these kinds of meshing or operations ? - How can I input the expected informations about faces selected, ... in the Boundary Layer window fields (format, ...) ? Thank you very much in advance for your help and answers, Best regards, Paul |
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April 17, 2018, 05:30 |
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#2 |
New Member
Paul Bertrand
Join Date: Apr 2018
Location: France
Posts: 8
Rep Power: 8 |
Hello,
It is not the solution that I hoped but I think it's the right solution (?) : If someone is interested, I will post a more detailled message but I finally used Engrid with a surface mesh from Gmsh (file .msh). Engrid is very efficient and allows to create a prismatic boundary layer easily, almost as easily as for commercial software. I will try to improve the method and I will come back to detail it... But if someone has other method based on Gmsh, I am still interested... |
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April 19, 2018, 17:16 |
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#3 |
New Member
Alberto Pizarro
Join Date: Feb 2016
Posts: 18
Rep Power: 10 |
Hi
Boundary Layer Field only works with 2D grids. You have to use 'extrude' commands for 3D problems. Regards |
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boundary layer mesh, gmsh |
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