Raising the time step 5x ran 1.9x faster; 10x ran no faster at all — the window implicit surface tension opens
·8 min read
Breaching the capillary time-step constraint leaves other ceilings standing. Janodet et al. (2025) measured the stability limit and the speed-up optimum at a density ratio of 1000.
A Single Ripple Outruns Its Own Group — Wave Dispersion and Group Velocity
·5 min read
Why every wavelength travels at its own speed, and phase and group part ways