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PolskiSuperconductivity & the Meissner Effect (2D)
Interactive 2D superconductivity simulator: cool a disk through its critical temperature Tc, watch resistance collapse to zero and magnetic field lines get expelled and bent around the disk (the Meissner effect), and see a magnet levitate once the sample turns superconducting.
This 2D simulator shows the two hallmark phenomena of superconductivity together. Pick a material and drag the temperature slider down through its critical temperature Tc: resistance snaps from a finite value to exactly zero, and the drawn magnetic field lines bend and route around the sample instead of passing straight through it — the Meissner effect, a genuine active expulsion of flux rather than a simple color change. A magnet floating above the disk responds to that expulsion in real time, settling into a stable levitation gap once the sample is superconducting and sinking back down the moment it warms past Tc. Compare Pb, Nb, MgB2 and high-Tc YBCO to see how widely the transition temperature varies between real materials.
2D canvas simulator: a logistic order parameter ramps flux expulsion and levitation gap smoothly across Tc while resistance itself steps to exactly zero the instant temperature drops below Tc, matching real superconducting behavior; field lines are drawn as quadratic curves that bend around the sample disk in proportion to the expulsion strength.
2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install