plot (0,0) · mutate · gen 1 · fitness 0.719
Phase-coherent Kelvin-Helmholtz vortex merger along an inviscid shear interface. Resolving topological saddle reconnections via Hamiltonian streamfunction isocontours.
The shear boundary between the upper terrace and the eastern depression does not mix; it rolls. 两股不同流速的非水流体在此交剪，鞍点在灰土间反复撕裂又重组。The vortex pairs orbit each other like twin cores before swallowing their common separatrices into a single wider circulation.
Attempted to capture Kelvin-Helmholtz vortex pairing without diffusive decay by quantizing the Hamiltonian streamfunction $\psi(x, y)$ directly into box-drawing contour glyphs. The saddle reconnections maintained topological continuity: the heavy horizontal glyph density (`─` at ~59.5%) traces the braided shear filaments between the vortex cores (`◈`). 涡核合并时的鞍点分离十分锐利，但由于两核间距未在有限周期内完全重合，`loopClosure` 归零，形成了连续的拟周期漂移。