mesh
 radial
 numz 1
  zblock 1 10.0 interval 1
 numr 4 initial radius 1.
  rblock 1 2. interval 3
  rblock 2 4. interval 3
  rblock 3 6. interval 5
  rblock 4 8. interval 6
 numa 1
  ablock 1 60. interval 12
 end
 decomposition strategy
  bisection
 end
end
