[Gmsh] meshing cylinder separately

[Geordie McBain]

2011/12/2 Prasant K Samantaray(Tikina) <prasantud at yahoo.com>:
> Hi I am trying to mesh a simple cylinder with its cylindrical surface, top surface and bottom surface separately.
> I have attached the geometry file below. I request your help in proceeding further. because while clicking 2D mesh, it meshes all the three surfaces at a time. I want to save the mesh file of each surface separately.
>
> Point(1) = {0,0,0,0.5};
> Point(2) = {1,0,0,0.5};
> Point(3) = {0,1,0,0.5};
> Point(4) = {-1,0,0,0.5};
> Point(5) = {0,-1,0,0.5};
>
> Circle(1) = {2,1,3};
> Circle(2) = {3,1,4};
> Circle(3) = {4,1,5};
> Circle(4) = {5,1,2};
>
> Line Loop(5) = {1,2,3,4};
> Plane Surface(6) = {5};
>
> Extrude {0,0,1} {
>   Surface{6};
> }

Hello.  An easy way is to have three separate copies of the .geo file
and in each declare just one of the surfaces a Physical Surface.  To
avoid duplication, you may Include the common code from a fourth
separate file.