Figure 2
From: Assembly along lines in boundary-driven dynamical system

Snapshots of the system near the assembly zone at six different times (expanded view). The position of the assembly zone is determined at an early stage of evolution (t = 100). Several lines meet at the assembly zone; the other lines appear to branch out of these lines (t = 1500). Density of particles on the lines increases as time progresses (see t = 500, 1500). Towards the end of the process, the number of lines decreases to three (t = 2000) and finally all the particles accumulate in the assembly zone (t = 2500).