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[FAQ]

When one does assembly meshing in ANSYS Workbench Meshing, it uses Tgrid code for mesh generation. For that it translates data from CAD format to faceted format (like STL). By default, CAD data itself is represented in Meshing as underlying facets. In most cases, if the quality of imported geometry is good, keeping Tessellation Refinement value to default works. Alternatively, one can set this value to 0, which means that no refinement would be performed on existing CAD facets, and data transfer will be faster. On investigation (looking at failed mesh in case of mesh failure, looking for smallest edges and features, also deciding inflation layer height, etc.), if one feels that a user defined value for tessellation refinement maybe required, one can estimate what is the minimum mesh size which will be needed for this model. For example, if one determines that the minimum mesh size needed would be 1e-3 m, then re-specify the Tessellation Refinement Tolerance value again and set it to 1/10th of that value, i.e., 1e-4 m in this case.