  mesh
   radial trisection
    trisection blocks, 4
    zmin -0.00075
    numz 1
      zblock 1 4. interval 4
    numr 3 initial radius 3.0
      rblock 1 2.0 interval 4
      rblock 2 3.0 interval 4
      rblock 3 5.0 interval 4
    numa 1
      ablock 1 360. interval 32
    end
   set assign
        nodeset, ihi, 40
        nodeset, khi, 10
        nodeset, klo, 20
        sideset, khi, 11
        sideset, klo, 21
        block sideset, ihi, 45, 2
        block sideset, klo, 65, 2
    end

    decomposition strategy
    bisection
    end
  end

