Creating Geometry from Mesh
A mesh imported into COMSOL Multiphysics can be used to construct a geometry.
Figure 8-25: A geometry is created from the imported STL mesh of a vertebra. The geometry of the vertebra is combined with the geometry of a block. Some boundaries are hidden for visibility.
If the goal is to improve the quality of the imported mesh, it is recommended to remesh the faces directly in the meshing sequence, without creating a geometry. See Remeshing Imported Meshes for more information.
Boolean operations when one or more of the parts originate from mesh are much more stable to run in the meshing sequence. Import any geometry to the meshing sequence and use a mesh Union operation to unite them in the meshing sequence. See Importing Geometry to Mesh.
1
Select the mesh part or meshing sequence with the imported mesh.
2
In the Mesh toolbar, click Create Geometry () or right-click and select it from the The Graphics Context Menu.
The COMSOL Multiphysics software creates a new model Component of the same dimension as the current mesh. The geometry sequence in the new component has an Import node that imports the original mesh as geometry.
Reusing the Original Mesh
It is sometimes possible to use the original, imported mesh, or parts of it, in the new Component.
1
Add a Copy () operation to the meshing sequence.
2
Select the original import sequence as Source Mesh.
3
Select source and destination entities.
4
Click the Copy button to copy the mesh. If you have added more geometry, you can use the usual mesh operations to add mesh to these entities. You can also add boundary layers to the copied mesh.
STL Import 1 — Generating a Geometry from an Imported Mesh: Application Library path COMSOL_Multiphysics/Meshing_Tutorials/stl_vertebra_import.