Why a Spinning Ball Curves — the Magnus Effect and Circulation
·5 min read
How a single spin bends a ball's path, explained through circulation
Waves Hanging in the Sky — The Kelvin-Helmholtz Instability
·7 min read
Why two streams at different speeds roll up into vortices
Why Smokestack Plumes Curl Up Instead of Lying Flat — The Jet in Crossflow and Its Counter-Rotating Vortex Pair
·6 min read
Why a jet fired across a wind folds into a kidney-shaped vortex pair.
Two Faces of a Whirl — Free Vortex, Forced Vortex, and Helmholtz
·5 min read
From a bathtub drain to a tornado, what vorticity actually measures