[stewels]

Hi All

For the last two days I've struggled with a problem I can't seem to solve, some help would be appreciated...

When I output a volume mesh from Gmsh in .SU2 format, the physical surfaces / volumes are not exported as "markers" in the file. Thus, SU2 does not not know which nodes form the surfaces of the body, farfield, inlet, etc. The volume mesh itself exports fine, it's just the marker sections that are missing.

Any ideas why this could be? Is there perhaps a way to export only the defined physical surfaces to SU2 format, so that I can manually merge the volume mesh with the physical surface boundaries? Gmsh doesn't give me the option to select specific physical entities when saving as .SU2?

For information, I generate an .STL geometry in OpenVSP with the inbuilt CFD meshing function. I then process the geometry as follows in Gmsh (I know I could have used extrude, but I kept the possibility open to have a non-box shaped boundary):

Merge "ABCDEFG.stl";
Point(1) = {-30, 20, 20, 1.0};
Point(2) = {-30, 20, -20, 1.0};
Point(3) = {-30, -20,20, 1.0};
Point(4) = {-30, -20,-20, 1.0};
Point(5) = {30, 20, 20, 1.0};
Point(6) = {30, 20, -20, 1.0};
Point(7) = {30, -20, 20, 1.0};
Point(8) = {30, -20, -20, 1.0};
Line(1) = {3, 7};
Line(2) = {1, 5};
Line(3) = {2, 6};
Line(4) = {4, 8};
Line(5) = {2, 4};
Line(6) = {6, 8};
Line(7) = {1, 3};
Line(8) = {5, 7};
Line(9) = {2, 1};
Line(10) = {4, 3};
Line(11) = {8, 7};
Line(12) = {6, 5};
Line Loop(13) = {9, 7, -10, -5};
Plane Surface(14) = {13};
Line Loop(15) = {2, 8, -1, -7};
Plane Surface(16) = {15};
Line Loop(17) = {12, -2, -9, 3};
Plane Surface(18) = {17};
Line Loop(19) = {5, 4, -6, -3};
Plane Surface(20) = {19};
Line Loop(21) = {12, 8, -11, -6};
Plane Surface(22) = {21};
Line Loop(23) = {10, 1, -11, -4};
Plane Surface(24) = {23};

Surface Loop(25) = {14, 18, 22, 16, 24, 20};
Surface Loop(27) = {1};
Volume(28) = {25,27};
Physical Surface("FARFIELD") = {25};
Physical Surface("BODY") = {27};

//To do inlet, outlet, etc.

Coherence;

Thanks a lot!