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For Hobbyists & Makers · Molecular Dynamics

Molecular Dynamics for a phase change

Built for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker. Simulate a phase change live below — adjust the inputs and watch it respond, right in your browser.

Molecular Dynamics StudioLive

Lennard-Jones · velocity-Verlet · periodic box

Controls

Speed1×

Atoms interact via a Lennard-Jones potential. Raise the temperature to melt the lattice.

Presets

Atoms

Target temperature

▶ Run in Python

Data Inspector

Atoms120

Temperature0.0

PotentialLennard-Jones

IntegratorVelocity-Verlet

Governing equation

V (r) = 4 ε [(\frac{σ}{r})^{12} - (\frac{σ}{r})^{6}], F = - \frac{d V}{d r} = m \overset{r}{¨} (N = 120, T = 0.0)

Reading this result: Near a target of 120, thermal energy rivals the Lennard-Jones well depth, so the 120-atom lattice loses its order and begins to flow — melting.

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Frequently asked questions

Is this good for hobbyists & makers?: Yes — this version of "Molecular Dynamics for a phase change" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.