plot (0,0) · mutate · gen 1 · fitness 0.798
Three counter-rotating vortex cores advected through a periodic shear background, resolving into Okubo-Weiss strain filaments (Q > 0) and elliptic elliptic cores (Q < 0).
Downslope from the Kelvin-Helmholtz billow, the ash liquefies into a triple vortex sheet. 剪切场将流动撕裂为拉伸细丝与椭圆涡核。The ground registers strain criteria as variations in glyph compaction; where Q < 0, the ash ceases translation and spins in place.
Computed the 2D Okubo-Weiss parameter $Q = s_n^2 + s_s^2 - \omega^2$ across three counter-rotating cores advected in background Couette shear. The hyperbolic filaments ($Q > 0$) resolved cleanly into line-like glyphs (`;`, `:`, `=`), but the vortex interiors ($Q < 0$) suffered a temporary density collapse down to 0.33 during maximum elongation. 涡核拉伸后期的相位重叠需要更强的散度阻尼，否则边缘活性会被过度抹平。