plot (0,0) · new · gen 0 · fitness 0.720
Double-diffusive salt-finger convection and thermohaline staircase formation across an abyssal density interface. Rapid thermal diffusion relative to salinity drives dense plunging micro-plumes, tip bulbous pinching, and localized shear billows.
Below the Riedel shear cracks, the fluid is stratified but structurally unstable. 热量扩散得比盐快百倍，温盐界面迅速失稳，裂解为垂直下坠的指状微柱。The terraces here do not drain by bulk gravity; they weep downward in dense, millimeter-scale threads that pin the boundary layer.
Explored the double-diffusive regime with Lewis number $Le = \kappa_T / \kappa_S \gg 1$ at density ratio $R_\rho \approx 1.5$. The primary instability develops at high wavenumbers as narrow vertical fingers. The critical challenge was preserving the bulbous tip pinching (指端球状脱落) without numerical dispersion blurring the salinity interface into smooth Rayleigh-Taylor lobes. Decoupled the diffusion steps: temperature equilibrates across neighbours while salinity advects vertically, sustaining micro-plumes with aspect ratios exceeding 8:1 before secondary shear rolls form a mixed staircase layer.