>[!warning] >This content has not been peer reviewed. # Constructal Flow — Results Output of **[[Constructal Flow - Code]]** (`rst_constructal_flow.py`). ## Vascular Emergence With a 15x15 lattice, source at (0,0), sink at (14,14), and 10% Landauer pruning per step, the graph reduces from ~420 edges to ~26 before disconnection. The surviving edges form a tree-like path from source to sink — a vascular or river-basin structure. ## Figure  *Final graph after Landauer pruning. Red = source, green = sink. Tree-like structure emerges from flow optimization.* ## Interpretation The Constructal law (Bejan): persisting systems evolve to provide easier access to currents. In the graph, edges that carry flow (shortest path and basin) are reinforced; edges that do not are pruned. The result is the least-resistance configuration — the same n ≈ 1.25 that eases flow in rivers, vasculature, and neural networks. Biology is the macroscopic limit of this optimization.