As a dude, why does our pee twist once it becomes airborne?
In: Physics
The piss stream has angular velocity as it leaves your urethra. That basically means it is rotating.
Now, since water has high cohesion force, meaning it likes to stick together, that keeps the piss stream twisting after it leaves your urethra instead of flying outward from the center.
If water didn’t have high cohesion, your piss stream would be pretty messy with the same urethra shape.
I believe it’s because the inside of the pee-tube is rifled, just like the rifling on a gun. It causes the liquid to spiral as it moves along the tube, and that spiralling continues in the air.
Because our pipe isn’t a completely cylindrical pipe. It has compressions, dilations. What’s more, the outlet isn’t exactly cylindrical either.
So the pee coming out isn’t exactly cylindrical either (there’s a sentence i never thought I’d be saying). Hence it twists and turns.
Why do you think just being a dude would give someone the knowledge in fluid dynamics required to answer this question?
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