Raising the time step 5x ran 1.9x faster; 10x ran no faster at all — the window implicit surface tension opens
·9 min read
At density ratio 1000, raising the capillary step 5x ran 1.9x faster. Pushing to 10x did not. Janodet et al. (2025) measured both walls.
A Single Ripple Outruns Its Own Group — Wave Dispersion and Group Velocity
·5 min read
Deep-water gravity waves move energy at half the phase speed. The slowest ripple is near 1.73 cm and 0.232 m/s, where gravity balances surface tension.