[Salome] ExtrudeMesh for Dummies

wolle1982 · October 28, 2008, 04:21

Hi,

here is an easy one. But still, I cannot figure it out. As an OpenFOAM Newbie I want to calculate a 2D Mesh with OF (airfoil). My 2D structure is meshed with SalomeMeca. Converting with ideasUnvToFoam doesn't work because of the lack of the third dimension.

What I do now is: I extrude the mesh in Salome. Define the boundaries. Export/Import it via ideasUnvToFoam.
So far so good. Defining the Borders is in my mind complicated while you have to select every single border-face itself (to group it). Isn't there an easier way??

The best would be to use the extrudeMesh tool. BUT here is my problem: For the extrudeMesh I need a 2D Mesh opened in OpenFOAM (FoamX Case). How do I get the 2D Mesh inside FoamX in the first place ???

I also tried to go over gmsh (import/export) since the gmshToFoam can import 2D Meshes. gmsh doesn't realize the mesh itself. So I cannot manipulate it (e.g. extrude it). But by using the extrudeMesh it doesn't create patches, faces or anything (except the second set of Vertexes). I tried to run blockMesh. But this need the blockMeshDict, which I don't have... It only gives me the "originalPatch, othersidePatch, rest"

Can anyone tell me the most comfort way to mesh an calculate an 2D airfoil (structured/hybrid grid)?!
The fluentMeshToFoam tool is great since it extrudes the Mesh itself. Poorly I don't have possibily to export from sSalome into FluentMesh.

Later I will have to calculate a complex 3D airfoil. I'm not sure if Salome is so friendly for this task. Any suggestions?

Thanks a lot!

tian · October 28, 2008, 04:46

Hi,

in Salome you can group your geometrie at first, than mesh it. "Create Group -> Group Type: Group on geometry"...

Have fun

Bye
Thomas

wolle1982 · October 28, 2008, 11:35

yes, that would work if I wouldn't extrude the mesh in Salome. See, the groups are Edges. After Extrution I need to define Faces. Since an Edge is devitet in e.g. 20 segments, afterwards I would have 20 Faces.

Keeps the question: How to use the extrudeMesh tool from OF with an 2D Mesh from Salome? I just cannot get the Mesh in FoamX or elsewhere.

October 28, 2008, 04:21	ExtrudeMesh for Dummies	#1
wolle1982 Senior Member Wolfgang Heydlauff Join Date: Mar 2009 Location: Germany Posts: 136 Rep Power: 21	Hi, here is an easy one. But still, I cannot figure it out. As an OpenFOAM Newbie I want to calculate a 2D Mesh with OF (airfoil). My 2D structure is meshed with SalomeMeca. Converting with ideasUnvToFoam doesn't work because of the lack of the third dimension. What I do now is: I extrude the mesh in Salome. Define the boundaries. Export/Import it via ideasUnvToFoam. So far so good. Defining the Borders is in my mind complicated while you have to select every single border-face itself (to group it). Isn't there an easier way?? The best would be to use the extrudeMesh tool. BUT here is my problem: For the extrudeMesh I need a 2D Mesh opened in OpenFOAM (FoamX Case). How do I get the 2D Mesh inside FoamX in the first place ??? I also tried to go over gmsh (import/export) since the gmshToFoam can import 2D Meshes. gmsh doesn't realize the mesh itself. So I cannot manipulate it (e.g. extrude it). But by using the extrudeMesh it doesn't create patches, faces or anything (except the second set of Vertexes). I tried to run blockMesh. But this need the blockMeshDict, which I don't have... It only gives me the "originalPatch, othersidePatch, rest" Can anyone tell me the most comfort way to mesh an calculate an 2D airfoil (structured/hybrid grid)?! The fluentMeshToFoam tool is great since it extrudes the Mesh itself. Poorly I don't have possibily to export from sSalome into FluentMesh. Later I will have to calculate a complex 3D airfoil. I'm not sure if Salome is so friendly for this task. Any suggestions? Thanks a lot!

October 28, 2008, 04:46	Hi, in Salome you can group	#2
tian Senior Member Tian Join Date: Mar 2009 Location: Berlin, germany Posts: 122 Rep Power: 17	Hi, in Salome you can group your geometrie at first, than mesh it. "Create Group -> Group Type: Group on geometry"... Have fun Bye Thomas __________________ BIM HVACTool, The Green Building Simulation Tool for OpenFOAM, Energy Plus and Radiance.

October 28, 2008, 11:35	yes, that would work if I woul	#3
wolle1982 Senior Member Wolfgang Heydlauff Join Date: Mar 2009 Location: Germany Posts: 136 Rep Power: 21	yes, that would work if I wouldn't extrude the mesh in Salome. See, the groups are Edges. After Extrution I need to define Faces. Since an Edge is devitet in e.g. 20 segments, afterwards I would have 20 Faces. Keeps the question: How to use the extrudeMesh tool from OF with an 2D Mesh from Salome? I just cannot get the Mesh in FoamX or elsewhere.

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