mesh
    rectilinear
      nx = 10
      ny = 20
      nz = 20
      bx =  1
      by =  1
      bz =  1
      gmin = -1.0 -1.0 -1.0
      gmax =  1.0  1.0  1.0
    end
      set assign
        sideset, ilo, 1               $ inner radial boundary
        sideset, ihi, 2               $ inner radial boundary
        sideset, jlo, 3               $ front surface (r-z plane)
        sideset, jhi, 4               $ back surface (r-z plane)
        sideset, klo, 5               $ top surface (r-theta plane)
        sideset, khi, 6               $ bottom surface (r-theta plane)
      end
end

