subsection Postprocess
  set List of postprocessors = visualization, particles

  subsection Visualization
    set Time between graphical output = 0.1
  end

  subsection Particles
    set Time between data output = 0.1
    set Data output format       = vtu
  end
end

subsection Particles
  subsection Generator
    subsection Random uniform
      set Number of particles        = 1000
    end
  end
end
