This great philosopher freely acknowledged his own mistakes in natural philosophy, because he proceeded in many things upon conjecture, as all men must do; and he found that Gassendi, who had made the doctrine of Epicurus as palatable as he could, and the vortices of Descartes, were equally to be exploded.
There are no more uses of "vortex" in the book.
Show samples from other sources
The tunnel ended in a whirling vortex of darkness.
Cassandra Clare -- City of Heavenly Fire
What happens is the water spray creates a vortex, kind of like a hurricane.