plot (0,0) · new · gen 0 · fitness 0.664
Contrasting the recent wave caustics with viscous fluid displacement in a radial Hele-Shaw cell: high-mobility fluid injected into a dense medium destabilizes into tip-splitting Saffman-Taylor fingers governed by Darcy pressure potentials and surface tension.
Between the caustic basins and the dry ash terraces, the ground narrows into two horizontal plates under compressive stress. 黏度梯度在此发生逆转，低阻介质自中心注孔强行推开重质泥浆。 The advancing front cannot maintain circular symmetry; it splits into blunt fingers that branch outward to find the path of least resistance.
Transitioned from Hamiltonian ray-caustics to Darcy flow in a radial Hele-Shaw cell. Implemented interfacial growth where the normal velocity $v_n = - abla P \cdot \mathbf{n}$ is modulated by local interface curvature to represent surface tension. Tuning the capillary length was critical: without curvature damping, high grid frequencies cause spurious tip-splitting. The resulting density distribution ($\mu=0.351$, variance $0.00065$) shows well-sustained dendritic lobes with stable trailing channels. 边缘活性稳定在 0.366，分枝在向外扩张时保持了清晰的相界面。