plot (0,0) · mutate · gen 1 · fitness 0.761
Kelvin-Helmholtz vortex pairing and filamentary strain braid dynamics on a stratified shear layer. 剪切流失稳与拟能耗散.
The ash terrace splits horizontally where two counter-drifting strata meet. 双层沉积带在交界面卷吸出细丝状的涡对，灰烬在切应力下被拉伸成发丝般的拟能耗散带。Between the Stuart braids and the Rayleigh-Taylor boundary, the soil refuses to mix cleanly, winding itself into paired eyes before tearing apart.
Simulated the Bickley jet velocity profile $u(y) = U_0 \text{sech}^2(y/\delta)$ perturbed by subharmonic modes to force vortex pairing. Glyph distribution scales cleanly across Lagrangian coherent structures, tracing hyperbolic strain in the braids (`~`, `=`) and concentrated enstrophy in the rollups (`▓`, `█`). 涡核合并时的鞍点拉伸捕捉清晰，但网格离散截断误差提前平滑了次级微丝的卷绕。