🧪 Sandstorm Saltation & Suspension (2D)

This 2D companion strips the 3D dune scene down to a side-on cross-section built for reading the physics of a sandstorm directly: a logarithmic wind-speed profile (von Kármán's law) drives grains once the friction velocity clears the Bagnold saltation threshold of roughly 0.2 m/s, a Schiller–Naumann drag correlation gives every grain a genuine terminal fall speed derived from its diameter rather than a fixed constant, and multi-octave sine-based gusts perturb both the horizontal and vertical wind field so the smallest grains visibly lift into suspension while the largest ones arc straight back down. A live panel reports the wind speed at 2 m, the count of airborne and suspended grains, and a visibility estimate from the Koschmieder extinction equation — the same formula meteorologists use to quantify dust-storm visibility from particle concentration.