Ok, thank you Timo :) So I think that if I want to refine a mesh I don't have to use GridGenerator::cylinder_shell isn't it ? But just use int z=2; CylinderBoundary<dim> inner_cylinder (inner_radius_value, z); CylinderBoundary<dim> outer_cylinder (outer_radius_value, z); to adapt correctly the shape of my mesh (?) > The first thing to try is to run the code in debug mode (and run in > gdb if that doesn't help). My guess is that your triangulation is not > empty when you are calling this function. > >
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