Hello,
I exported a 3D model with a tetrahedral mesh from Dragonfly into HyperMesh. The model contains a very high number of elements, so I need to make the mesh coarser.
I first tried to remesh the 3D elements directly, but I was not able to reduce the number of elements significantly. I then found a discussion on the Altair Community about another method for coarsening tetrahedral meshes:
https://community.altair.com/discussion/897/coarsen-tetra-mesh
I followed the suggested workflow by extracting the faces, creating a 2D surface mesh, and then coarsening the 2D elements using Topology > Edit > Coarsen > 2D. This successfully reduced the number of surface elements by about half. Then, I deleted the original Tet meshes.
However, when I tried to generate a new 3D tetrahedral mesh from the coarsened 2D mesh, HyperMesh reported two free edges, so the surface is no longer fully enclosed. I have tried several methods to repair these free edges, but so far I have not been able to resolve the issue.
I would appreciate any advice on how I can fix these free edges and obtain a closed volume so that I can generate the 3D tetrahedral mesh.
Thank you for your help.
