MeltSim — thermodynamics sandbox

material

drag on the window to aim the heater

isotherms (melt band contours)

power 25 kW/m² span 40%

ambient 22 °C time × 126

conductivity × 1.0 latent heat × 1.0 viscosity × 1.0

T max vs time --

molten % vs time --

ledger balances to machine precision

Educational model — enthalpy-method conduction, boiling & solidification with a mass-conserving slumping automaton. Not a CFD solver.