By that I mean literally sucking up stuff. The vent fan above my stove only seems to actually pull anything in while it’s on low; setting it to high makes it louder but stops pulling any smoke or steam up through the hood. I’m just curious how the hell that works; shouldn’t a faster spinning fan suck MORE? Is there some property of aerodynamics that was forgotten when they installed this shit?
Cavitation occurs in a liquid. When you’re pushing air, you may bump into other types of problems like stalling. If the fan is connected to a pipe, you can also get repeating surges of airflow.