Surface remeshing and tetrahedral mesh generation for a more complicated t-tubular structure. (a) The original surface mesh consists of 38, 557 vertices and 48, 018 triangles. (b) The regenerated mesh, with 7, 721 vertices and 15, 442 triangles, shows much smoother surface and higher quality. (c) The tetrahedral mesh, generated from the mesh in (b), has 24, 912 vertices and 94, 424 tetrahedra. (d) The histograms of both domain surface mesh and entire tetrahedral mesh. The minimal and maximal angles (or dihedral angles) are indicated by red vertical bars.