  mesh
   radial trisection
    trisection blocks, 2
    zmin -0.00075
    numz 1
      zblock 1 1. interval 4
    numr 3 initial radius 3.0
      rblock 1 2.0 interval 4
      rblock 2 3.0 interval 4
      rblock 3 4.0 interval 4
    numa 1
      ablock 1 90. interval 12
    end
   set assign
$        sideset,jlo,3
$        sideset,jhi,6
        nodeset,jlo,4
$        nodeset,jhi,5
$
        nodeset, khi, 10
        nodeset, klo, 20
        sideset, khi, 11
        sideset, klo, 21
        block sideset, ihi, 45, 2
    end


    decomposition strategy
     random
    end
  end

