To remesh imported meshes, use the operations Remesh Faces (3D), Remesh Edges, and Remesh Domains (2D), as shown in Figure 8-24.

For faces in 3D, you can also use the operations Free Triangular, Free Quad, or Mapped. If you instead want to refine or coarsen an imported calculation mesh, use Refine or Adapt. For more information, see the section Modifying the Element Size Using Refine and Adapt.

Use local attributes, such as Size, to control the size of the mesh and use Fixed Mesh to keep the mesh fixed on edges and faces while remeshing. To ensure identical meshes on periodic and symmetric boundaries, use the Identical Mesh attribute.

To remesh an imported domain mesh in 3D, clear the check box Import domain elements check box in the settings for the Import node or use a Delete Entities operation to delete the domain elements. Remesh the boundaries and once the surface mesh is of sufficiently good quality, add a Free Tetrahedral and/or Swept operations to mesh the domains. If this is needed for the simulation, add Boundary Layers once the domain mesh is restored. With a volume mesh in the domains, the mesh is ready to be used for simulation. The physics is applied to the domains and boundaries defined by the mesh, so no geometry is needed.

As an alternative, it is possible to generate a geometry from the imported mesh before creating a mesh for simulation. For more information about this workflow, see Creating Geometry from Mesh.