Conservation of mass along with Kelvin's theorem and Helmholtz's three theorems regarding these are used to describe their stretching.
Grobli first solved the integrable problem of three of these objects. Conservation of mass along with Kelvin's theorem and Helmholtz's three theorems regarding these are used to describe their stretching. Taylor and Green names one of these objects which was used to study turbulence and which is an exact solution of the incompressible Navier-Stokes equation. When the Reynolds number exceeds 80, these objects are periodically (*) generated during viscous incompressible flow around a cylinder. In addition to being the focus of the von Karman street, these objects are the namesake of a quantity defined as the curl of velocity. Examples of these objects include smoke rings and tornadoes. For 10 points, name these objects that feature fluid swirling around a center.
Grobli first solved the integrable problem of three of these objects.
vortex [accept vortices]