Wind field collision study · Lower Manhattan, New York
— fps · grid — · — cells
mean |u| — m/s peak — m/s
div residual — step —
Method. A staggered Eulerian grid solves incompressible Navier–Stokes
in real time using a predictor–corrector scheme: a semi‑Lagrangian
prediction step advects velocity and smoke density backward through
the field, then a Jacobi pressure solve corrects the result to be
divergence‑free, with vorticity confinement restoring sub‑grid turbulence.
The tower cluster is baked into the grid as a solid boundary — wind and fog
genuinely deflect, separate and re‑circulate around its spires.
Reading the field
● fog density — volumetric, GPU ray‑marched
● streamlines — particles advected by u
Drag to orbit · scroll to dolly · tap a preset to fly to it.
