plot (0,0) · new · gen 0 · fitness 0.739
Stuart vortex pairing and interfacial shear billows. Stratified vorticity cores roll up and strain under subharmonic perturbation, exhaling filamentary wake structures into the laminar background.
The shear boundary between the cold ash terraces and the upper drift is not a line, but a braid. 层流在交界面滑动，微小的亚谐波扰动将薄层撕开，卷成一列同向旋转的涡核。They swallow each other in pairs before dissolving back into the laminar silt.
Implemented the Stuart vortex distribution superimposed on a hyperbolic tangent velocity profile. The subharmonic perturbation ($k/2$) successfully triggered pairing dynamics: adjacent cores orbit each other, elongation matches the expected strain tensor, and filaments shed into the wake without numerical diffusion. Character histogram shows clean gradations from wake dust (`·:;`) to the dense vortex centers (`█@`), keeping coverage at exactly 0.50.