Planetary Formation — Accretion Disc & Planetesimals

Disc Presets

Parameters

Particle count N 200

Disc density Σ 1.0×

Sticking velocity v_stick 0.30

Drag coefficient β 0.010

Controls

Speed 1×

Stats

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Bodies

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Largest mass

Time (kyr)

Merges

Drag: F = −β·v
Gravitational focusing: σ = πr²(1 + v_esc²/v²)
Runaway accretion: dM/dt ∝ r²·Σ·Ω
Snowline ~3 AU: icy bodies beyond