# GMSH mesh export problems

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 March 16, 2021, 04:21 GMSH mesh export problems #1 New Member   Join Date: Mar 2021 Posts: 1 Rep Power: 0 Hi, We are trying to export a mesh for EM FEM simulations. We are having problems exporting so that we get PhysicalNames / physical groups assigned to the individual elements and nodes. I have included a the geo file below. When we export the mesh all elements are assigned to group 0. Thanks for the help. ------------------- // Gmsh project created on Mon Mar 15 15:42:18 2021 SetFactory("OpenCASCADE"); //+ Point(1) = {-1, 1, 0, 1.0}; //+ Point(2) = {1, 1, 0, 1.0}; //+ Point(3) = {1, -1, 0, 1.0}; //+ Point(4) = {-1, -1, 0, 1.0}; //+ Point(5) = {-0.9, 0.9, 0, 1.0}; //+ Point(6) = {0.9, 0.9, 0, 1.0}; //+ Point(7) = {0.9, -0.9, 0, 1.0}; //+ Point(8) = {-0.9, -0.9, 0, 1.0}; //+ Line(1) = {1, 2}; //+ Line(2) = {2, 6}; //+ Line(3) = {6, 5}; //+ Line(4) = {5, 1}; //+ Line(5) = {2, 3}; //+ Line(6) = {7, 3}; //+ Line(7) = {7, 6}; //+ Line(8) = {7, 8}; //+ Line(9) = {8, 4}; //+ Line(10) = {4, 3}; //+ Line(11) = {8, 5}; //+ Line(12) = {1, 4}; //+ Curve Loop(1) = {1, 2, 3, 4}; //+ Plane Surface(1) = {1}; //+ Curve Loop(2) = {2, -7, 6, -5}; //+ Plane Surface(2) = {2}; //+ Curve Loop(3) = {8, 9, 10, -6}; //+ Plane Surface(3) = {3}; //+ Curve Loop(4) = {11, 4, 12, -9}; //+ Plane Surface(4) = {4}; //+ Curve Loop(5) = {3, -11, -8, 7}; //+ Plane Surface(5) = {5}; //+ Extrude {0, 0, 4} { Surface{1}; } //+ Extrude {0, 0, 4} { Surface{2}; } //+ Extrude {0, 0, 4} { Surface{3}; } //+ Extrude {0, 0, 4} { Surface{4}; } //+ Extrude {0, 0, 4} { Surface{5}; } //+ Physical Volume("freeSpace", 53) = {5}; //+ Physical Volume("metal", 54) = {1}; //+ Physical Volume("metal", 54) += {4}; //+ Physical Volume("metal", 54) += {3}; //+ Physical Volume("metal", 54) += {2}; //+ Physical Surface("port1", 55) = {30}; //+ Physical Surface("port2", 56) = {5}; ------------------- \$MeshFormat 4.1 0 8 \$EndMeshFormat \$PhysicalNames 4 2 55 "port1" 2 56 "port2" 3 53 "freeSpace" 3 54 "metal" \$EndPhysicalNames \$Entities 28 52 30 5 1 -1 1 0 0 2 1 1 0 0 3 1 -1 0 0 4 -1 -1 0 0 5 -0.9 0.9 0 0 6 0.9 0.9 0 0 7 0.9 -0.9 0 0 8 -0.9 -0.9 0 0 9 -1 1 4 0 10 1 1 4 0 11 0.9 0.9 4 0 12 -0.9 0.9 4 0 13 1 1 4 0 14 0.9 0.9 4 0 15 0.9 -0.9 4 0 16 1 -1 4 0 17 0.9 -0.9 4 0 18 -0.9 -0.9 4 0 19 -1 -1 4 0 20 1 -1 4 0 21 -0.9 -0.9 4 0 22 -0.9 0.9 4 0 23 -1 1 4 0 24 -1 -1 4 0 ....

 Tags gmsh, gmsh 4.7.1

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