https://www.asme.org/topics-resources/content/an-example-of-a-vortex-shedding-flowmeter
Vortex Shedding Flowmeters - ASME
Vortex shedding flowmeters detect and measure the velocity of liquid and gas vortices that are formed when the aerodynamics of a gas or liquid stream are...
vortex sheddingflowmetersasme