gmsh STL
 

Hi,

I want to generate a mesh around an object using gmsh. This object is defined using a STL file.
My current geo file is organised as follow:
1/ importing the STL object;
2/ creating the bounding box around the object;
3/ physical surface definition.

I've got different problems:
- I don"t know how to link the surface of the object with the different surfaces of the box. Consequently, the generated mesh with gmsh is not taking into account the STL object.
- How can determine the physical entities (surface and volume) ?

The geo file is the following one:
// --------------------------------------------------
// STL Object
// --------------------------------------------------
// merge a surface mesh
Merge "cone.stl";

// add a geometrical volume
Surface Loop(1) = {1};
Volume(1) = {1};

// --------------------------------------------------
// Bounding Box
// --------------------------------------------------
l = 1;

xmin = -10;
xmax = 10;
ymin = -10;
ymax = 10;
zmin = -10;
zmax = 10;

Point(1000) = {xmin, ymin, zmin, l};
Point(1001) = {xmin, ymin, zmax, l};
Point(1010) = {xmin, ymax, zmin, l};
Point(1011) = {xmin, ymax, zmax, l};

Line(2001) = {1000, 1001};
Line(2002) = {1001, 1011};
Line(2003) = {1011, 1010};
Line(2004) = {1010, 1000};

Line Loop (2005) = {2001, 2002, 2003, 2004};
Plane Surface(10006) = {2005};
box[] = Extrude {(xmax-xmin), 0, 0}{
Surface{10006};
// Layers{1};
};
Delete { Volume{box[1]}; }

// TODO
// Volume(4000) = {?};

// --------------------------------------------------
// Physics
// --------------------------------------------------
// Physical Surface("back") = {?};
// Physical Surface("front") = {?};
// Physical Surface("top") = {?};
// Physical Surface("bottom") = {?};
// Physical Surface("left") = {?};
// Physical Surface("right") = {?};
// Physical Surface("object") = {?};
// Physical Volume("internal") = {?};

Problem solved.

Hello David,
Could you please share with us as to how you solved this problem?

Thanks,
Albert

Anyone else has any suggestions regarding generating meshes around STL objects with GMSH? Any examples would be helpful. Please?

Albert