How do I simulate a phase change?

Open this page and use the live Molecular Dynamics tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.

Can I use my own numbers?

Absolutely — every input is adjustable, and with data import you can drive a phase change from your own measurements.

Use case · powered by Molecular Dynamics

Molecular Dynamics for a phase change

Simulate a phase change live in your browser. This runs the real Molecular Dynamics solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

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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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About this simulation

The full Molecular Dynamics tool models a phase change with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

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Frequently asked questions

How do I simulate a phase change?: Open this page and use the live Molecular Dynamics tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?: Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?: Absolutely — every input is adjustable, and with data import you can drive a phase change from your own measurements.