The lattice starts all −1 under a small field h favouring +1. Spins flip by Metropolis at temperature T. Droplets of +1 form and mostly shrink back, because their surface costs more than their volume gains.
Tap to plant a nucleus and skip the wait. The same ?seed= always gives the same run.
LITClassical nucleation in the kinetic Ising model. Every 30 steps the tracked magnetisation must match a fresh recount, or the page throws.
AMBERCritical size and rates are shown, not computed.