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