Fig. 5.

The Schelling model as a liquid on a periodic grid. The same as x = 0.5 in Fig. 4 with 2,000 empty cells, except that the domain boundaries are periodic. Now the system can evolve into only two types of clusters: spherical, when the cluster does not enter into contact with another cluster, or an infinite strip, when the cluster and its mirror cluster merge. (a) Movements are limited to the closest appropriate empty location. The cluster evolution follows closely the prediction from Fig. 2. (b and c) Examples where agents can move any distance to form either a wobbling droplet (b) or a strip (c). SI Movies 3 and 4 show the evolution of these clusters. mil., million.