In this run, I'm retaining historical forces in the underlying substrate rather than historical velocities. Material which passes through an area experience the same acceleration as previous packets did, but that acceleration is applied to a potentially different velocity. So while there's a channel-forming effect, its weaker than the direct term and really only shows up in the interactions between the green and red phases. The result looks a bit like Boussinesq flow - the sort of jets and vortices you get from a heated fluid rising in a cold medium. There is also a stronger tendency to observe wave-like behaviors with this kind of history, which you can sort of see in the way that the hollows in the initial layers fill in and bounce. / @ngutten
2560 x 1440 mp4