Swirling Vortexes Hermann von Helmholtz (ca. 1821–1894) was a German physician and physicist who studied fluid dynamics. Specifically, Helmholtz studied vortexes in fluids and developed three theorems which still stand today. The second of Helmholtz’s theorems for vortex dynamics in inviscid fluid states: A vortex filament cannot end in a fluid; it must extend to the boundaries of the […]