Graphical labs · Discrete lab (diagnostics on screen)
Ising model
2D Metropolis, Onsager T_c
H = −J Σ_<ij> s_i s_j · Metropolis · T_c = 2 / ln(1+√2) (Onsager)
Gold = +1, dark = −1. Periodic lattice, h=0, J=1.
- T / J
- 2.20000
- Onsager T_c
- 2.26919
- T / T_c
- 0.969511
- m
- 0.0327148
- E/N
- -0.00585938
Finite-difference / Monte Carlo / RK scheme at teaching resolution. Conserved quantities are diagnostics. FrameCalc is an educational workbench. It is not for medical, nuclear-safety, radiation-protection, or engineering sign-off. Fusion and IEC estimates are models, not device predictions. Accuracy · Legal