[PeterBaek]

Hello

I am trying to generate my first mesh for SU2 through gmsh and have reached the following error.

Error in "bool CSU2ASCIIMeshReaderFVM::ReadMetadata(bool, CConfig*)":
-------------------------------------------------------------------------
Could not find the keyword "NMARK=".
Check the SU2 ASCII file format.
------------------------------ Error Exit -------------------------------



I have exported my mesh as su2 where I attained the following error

Mismatch between NPOIN and number of points listed in mesh file.
Please check the mesh file for correctness.

which I solved by deleting my center point for my sphere in the mesh file.
Does anyone know how to handle my error with NMARK? (NMARK is present in the file so I do not see the problem)

Here is my .geo file from gmsh.

--------------------------------------------------------------------------------------
// Gmsh project created on Tue Jan 09 14:52:39 2024
SetFactory("OpenCASCADE");
//+
Point(0) = {0, -0, 0, 1.0};
Point(1) = {-0.1524, -0, 0, 1.0};
Point(2) = {0,0.1524,0,1.0};
Point(3) = {-0.3,0,0,1.0};
Point(4) = {0,0.3,0,1.0};
Point(5) = {0,0,0,1.0};


Line(1) = {1,3};
Line(2) = {2,4};

Circle(3) = {1, 0, 2};
//+
Circle(4) = {3, 0, 4};
//+
Curve Loop(1) = {4, -2, -3, 1};
//+
Plane Surface(1) = {1};
//+
Transfinite Curve {3, 4} = 150 Using Progression 1;
//+
Transfinite Curve {1, 2} = 60 Using Progression 1.05;
//+
Transfinite Surface {1};
//+

//+
Extrude {0, 0, 0.01} {
Surface{1}; Layers {1}; Recombine;
}
//+
Transfinite Volume{1};
//+
Physical Surface("Wall", 13) = {4};
//+//+
Physical Surface("symmetry", 15) = {5};
//+
Physical Surface("Exit", 16) = {3};

//+
Physical Surface("Inlet", 14) = {2};
--------------------------------------------------------------------------------------


Best.
Peter

[bigfootedrockmidget]

Do you really need an extruded 3D mesh with one cell in the z-direction?
If so, you also need to define a volume or else you will only have surface meshes (and no mesh in the .su2 file).

[PeterBaek]

Thanks for the reply.
I will in the future investigate more complex cases where extrude is needed which is why I am interested in this simple 3D case.
I have added a physical volume "Physical Volume("inside", 18) = {1};"
However I get the exact same error

[bigfootedrockmidget]

Hi,
You need to add the geometric volume as well as the physical marker:

//+
Physical Volume("interior", 27) = {1};
//+
Volume(2) = {1};
//+
Recombine Surface "*";

Also be aware that there is a bug in an older version of gmsh where all interior points are saved as a marker (4.11.1 had this)