Figure 1. The Setup
Two nemitubes have open nTubes. The one on the lower left is closed.
Figure 2. Snapshot a Time X
The full field is a closed space. Indicated by red borders at the edges.
The Closed nTube has a significantly different pattern.
Figure 3. Snapshot at Time X + approximately 1 sec.
It's hard to see with only snapshots but the closed nTube in the lower right moves into non linear effects with relatively few iterations.
Figure 4.
The same set up of wave sources, with no walls, to emulate a perfectly open system.
The same set up of wave sources, with no walls, to emulate a perfectly open system.





















