Wiktionary
n. (context physics fluid mechanics English) The reduction in fluid pressure that results when a fluid flows through a constriction.
Wikipedia
The Venturi effect is the reduction in fluid pressure that results when a fluid flows through a constricted section (or choke) of a pipe. The Venturi effect is named after Giovanni Battista Venturi (1746–1822), an Italian physicist.
Usage examples of "venturi effect".
Jack didn't remember whether it was Bernoulli's Principle or the Venturi Effect, but he knew that it was something inferred, not actually seen, that enabled aircraft to fly.
I'm certain that paraboloidal jib uses the Venturi effect with malice aforethought.
He vowed to stop before the narrowing neck could create another venturi effect, but was so oppressed by now with high pressure that once more his judgement failed.
Then he went on to bore me with a lot of details about jet engines, the venturi effect, increasing lift by increasing camber with the flaps, and how after all four engines flame out the plane will turn into a 450,000-pound glider.
It also happened that the hurricane was blowing crosswise of the hatch opening, which treated us to a Venturi effect.