How to Generate a Coarse 3D Tetra Mesh

Question

Hello,

I imported a 3D model from Dragonfly into HyperMesh 2024.1, as shown below. The model already contains a 2D surface mesh.

I am trying to generate a coarser 3D tetrahedral mesh. However, after increasing both the average and minimum element size, the number of 3D elements does not decrease significantly beyond a certain point.

Could this be caused by the very large number of surfaces in the model? If so, is there a recommended way to reduce or simplify the number of surfaces while preserving the phase boundaries, so that a coarser 3D mesh can be generated?

Alternatively, is there another method in HyperMesh to further reduce the number of 3D elements?

I would appreciate any advice.

nafise · Answer

Hello Jason,

Thank you for your reply. I tried to make the 2D mesh coarser using the Coarsen tool in the Topology menu, but the mesh quality became poor, with several distorted and elongated elements.

Jason_Craanen · Answer

Hello,

Since you are using the shell mesh to generate or fill with tetras, the shell mesh needs to be coarsened first