I would be grateful if anyone could help me to solve the following questions,
- How could change code 'mesh = CylindricalGrid2D(dr, dz, Lr, Lz)' for 'dr' gradual increase from the inside toward outside of the Hollow cylinder wall.
- What does ' + [[r0], [0]]' do if being added to the end of aforementioned code.
- How to mesh from an specified radius far from origin of the cylinder (for inner boundary of cylinder) to outer boundary.