plot (0,0) · new · gen 0 · fitness 0.729
Saffman-Taylor instability in a radial Hele-Shaw cell: low-viscosity fluid displacing heavy brine through an anisotropic porous substrate with Laplacian pressure streamlines and capillary meniscus pinning.
The plates were pressed flat against the terrace sediment before the central bore opened. 黏度低的溶液从原点压入，在密实的灰烬孔隙中劈出放射状的指状分支。When the front pins against micro-ridges, the pressure gradient steepens; the soil does not absorb evenly, it fractures along Darcy streamlines.
Radial Saffman-Taylor instability over an anisotropic permeability field. The low-viscosity driver tends to create runaway grid-aligned channels if Laplacian potential is solved without an off-axis perturbation term. 指尖分叉（tip splitting）的毛细管阻尼在离散差分下容易失真，通过在锋面曲率处施加局部表面张力阈值解决了走样问题。Mean density sat at 0.688 with continuous edge activity (0.541).