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# help on how to manage 1D and 2D elements in a mesh ?

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• ### help on how to manage 1D and 2D elements in a mesh ?

Posted by bereux at October 19. 2006
Hello,

for an electrical engineering application I have the following very simple case :
- a rectangular finite-size ground plane (e.g. 2 m x 1 m in the Z=0 plane),
- a wire lying above the ground plane (e.g. Z=0.1 m, Y=0 m,  1  m long along  X direction).

I would like to mesh this model with :
- 2D triangles (e.g. 0.2 m average length) for the ground plane,
- 1D triangles (e.g. 0.02 m average length) for the wire
and export this mesh as a .unv file.

I did the following :
in GEOM :
create a face (for the ground plane)
create a wire (for the wire)
...but I do not know if it is possible (and how to do) to merge them in a single geometry (I tried a "fuse" but "operation can not be performed on the given shapes".

Nevertheless, I went to MESH:
I created a Mesh for the ground plane,
I created a Mesh for the wire,
but I do not know how to merge them in a single mesh.

I would be very grateful for any help on how to proceed.
Best regards,

François
• ### Re: help on how to manage 1D and 2D elements in a mesh ?

Posted by Grigory Zhivotovsky at October 20. 2006

Hello, François

in GEOM :

1. Create a wire, create a face (for the ground plane)
2. Create 2 vertexes, create an edge (for the wire)

3. Build compound combining 2 objects: face and edge

In MESH:
1.  Create a Mesh for compound with Triangle Mefisto, Length from edges 2D hypothesis, Wire discretization, Average length 0.2 1D hypothesis

2. Create a SubMesh for edge with Wire discretization, Average length 0.02 1D hypothesis
3. Compute a single mesh.

4. Export this mesh as a .unv file

5. Enjoy results

Best regards,
Grigory

• ### Re: help on how to manage 1D and 2D elements in a mesh ?

Posted by bereux at October 23. 2006
Hello Grigory,

thank you for your help. It works fine.
Best regards,

François