On the grid file format and element order related problems
I am trying to do tetrahedral meshwork on the STL format model, so I used the code of tutorial t13.cpp and output an INP format mesh file.Now I'm going to use a second order tetrahedron element, so I added this line of code
gmsh::model::mesh::setOrder(1);
However, when I look up the resulting INP file, I find that it has exactly the same contents as the resulting INP file for the first-order tetrahedral element, and that the element type is C3D4, not C3D10, as I expected.I don't know what the problem is, but I hope I can find the answer here