Creating Geometry from Mesh
A mesh imported into COMSOL Multiphysics can be used to construct a geometry. It is recommended to use it as an aid when positioning the geometry, as shown in the suggested tutorial below. This is best done by marking it as Construction Geometry in the geometry Import node (see Import of Mesh or 3D Printing File).
Figure 8-29: Importing the mesh of the vertebrae and disc into the geometry sequence as a construction object to help with the positioning of the geometry.
If the goal is to repair and/or improve the quality of the imported mesh (including STL), it is recommended to import the mesh file into a Mesh-Based Geometry sequence. See also Creating a Computational Mesh for Imported Mesh Data.
If the goal is to combine the imported mesh (including STL) with geometry objects, it is recommended to work in a Mesh-Based Geometry. Boolean operations when one or more of the parts originate from mesh are more stable to build using a mesh Union operation, instead of using Boolean operations in the Geometry sequence. See also Importing Geometry to Mesh.
To create a geometry from a mesh, choose one of the following:
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Add an Import node to the geometry sequence and browse to import any supported mesh file.
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Optional, but recommended if combining the geometry with imported mesh: Select the Construction Geometry checkbox to use the generated object as a tool object to aid with positioning the geometry relative to the mesh.
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Select an existing mesh part or meshing sequence. In the Mesh toolbar, click Create Geometry () or right-click and select it from The Graphics Context Menu.
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Optional, but recommended if combining the geometry with imported mesh: Add a Mesh-Based Geometry node add two Import nodes: one that imports the Geometry sequence, and one that imports the mesh. See the tutorial below for an example of how this can be done.
STL Import 2 — Combining Geometry with an Imported Mesh: Application Library path COMSOL_Multiphysics/Meshing_Tutorials/stl_2_combine_geom_mesh