Detailed description and alternate definitions of the word 'vortex':

A spiral motion of fluid within a limited area, especially a whirling mass of water or air that sucks everything near it toward its center.

A circular, spiral, or helical motion in a fluid (such as a gas) or the fluid in such a motion. A vortex often forms around areas of low pressure and attracts the fluid (and the objects moving within it) toward its center. Tornados are examples of vortexes; vortexes that form around flying objects are a source of turbulence and drag. See also

A place or situation regarded as drawing into its center all that surrounds it.
Synonyms of word 'vortex' :

whirlpool

whirl

convolution

swirl

maelstrom