Gas and Brownian Motion Lab

Preparing WebAssembly runtime…

Simulation mode

Model

Brownian mode adds a heavier tracer moving inside the particle bath.

Bath and box

Time scale (×)

Particle count

Gas preset

Presets change molar mass, particle mass and the effective collision radius.

Box width (m)

Box height (m)

Physics time step (s)

Thermal level (K)

Seed

Brownian tracer

Record tracer trail

Disable the trail to reduce update and draw cost at higher particle counts.

Tracer mass scale (×)

Tracer radius scale (×)

Display

Show grid

Show pressure plot

Status

State: —
Simulation time(s): —
Instantaneous pressure(N/m): —
Effective temperature(K): —
Average kinetic energy(J): —
Average speed(m/s): —
Active particles: —

Analysis

Pressure history

Instantaneous wall loading over the recent sliding window.

Keyboard and mouse

Space: start or pause
R: reset
1 / 2: change mode
T: tracer trail
WASD: pan · Q/E: zoom · F: reset camera

Desktop-first v1: the interactive canvas targets viewports of at least 1024 × 640 pixels with keyboard and mouse input. Smaller screens will receive a guided fallback rather than an unusable canvas.

Interactive simulation