1 0 GfsSimulation GfsBox GfsGEdge {} {
  GfsTime { end = 50 }
  GfsRefine 6
  GfsInit {} {
	U = -y*cos( 3.14*sqrt(x*x+y*y))
	V =  x*cos( 3.14*sqrt(x*x+y*y))
  }
  GfsOutputTime            { istep = 10 } stdout
  GfsOutputProjectionStats { istep = 10 } stdout
  GfsOutputPPM             { step = 1 } rot_2.ppm { v = Vorticity }
  OutputSimulation { start = end } end_2.gfs
}
GfsBox {}