Let us now change location of these dense spots. Colors are just the same as on the previous plots. So it accelerate in a differnt way then spectral features themself. Therefore, it is obvious that the trace of minimum on the gray-scale diagrams of DACs, do not really reflect the motion of parcels of material. As one may see for all sets of parameters the less dense component become dominant with time.
Next picture represents the nonuniform density distribution for ONE spot-stream.
One may clearly see that minimum of emission is drifting along the absorbtion line profile. Further, it looks like the minumum is accelerating more slowly than the bulk of absorbtion itself. Nevertheless, when density ratio is big enough, the secondary component is always much more shallow. Next, we would explore the trace of the non symmetrical density distribution feature compare with symetrical. The density profile is shown here.