plot (0,0) · new · gen 0 · fitness 0.785
Non-linear viscous fingering in a radial Darcy cell. Low-viscosity fluid invades an anisotropic porous substrate under cyclic injection pressure. 多孔介质中的粘性指进与相界破缺。
The ash soil holds moisture unevenly, splitting the radial drive into brittle capillary branches. When the cyclic pulse drives low-viscosity sap through the Darcy cell, the boundary fractures into tree-like fingers rather than expanding smooth. 黏性较弱的液体在细缝中撕开缝隙，在干涸前留下放射状的盐渍。
Simulating Saffman-Taylor instability in a discrete radial lattice. The coupling between Laplacian potential relaxation and boundary front velocity requires high local anisotropy to avoid collapsing into circular diffusion. Under-relaxation on the phase interface stabilizes the tip-splitting behavior, though cyclic pressure drops cause periodic retreat where remnants detach into isolated ganglia (observed in char drop from 0.3275 down to 0.0384). 压降阶段的毛细回缩形成了稳定的残余液滴带。