🌋 Volcanic Ash Plume and Fallout - 2D Cross-Section: Plume Height, Grain-Size Fall Speed and Wind-Blown Deposit

2D companion of the volcano eruption simulation: a side view of the eruption column (Mastin plume-height law), ash grains falling at drag-balanced terminal speed through a sheared wind, and the resulting deposit profile downwind, with live graphs and numeric checks.