Suspension

Particle count: 220 Temperature T: 298 K Viscosity η: 1.0 mPa·s Particle radius r: 50 nm

DLVO interaction

Salt / ionic strength: 5 mM Stickiness (Hamaker depth): 1.0 Gravity / sediment

Stats

Particles—

Clusters—

Mean cluster size—

Largest cluster—

Temperature—

Diffusion D—

Fractal dim. d_f—

Regime—

Colloidal particles jitter by Brownian motion; the step size obeys the Stokes–Einstein law D = k_BT / (6πηr), so heat speeds them up and large or viscous-bound particles crawl. Whether they stay dispersed or flocculate is set by DLVO theory: a short-range van der Waals attraction competes with an electrostatic repulsion barrier. Adding salt screens the charge, the barrier falls, and touching particles stick to grow fractal aggregates (diffusion-limited cluster aggregation). Turn on gravity to watch heavy clusters settle.