Algodoo

Cool!

I found that the water drops are easier to follow by turning down the "Simulation Speed" slider (maybe all the way down to 0.1), and by increasing the "Simulation Frequency" which will smoothen the motion.

Nature is fascinating and often very surprising.

I concur.

s_noonan -- Correct me if I am mistaken, but when the rotation of the sprinkler on the left is stopped, the newly spawned water drops at the nozzles have little to no radial velocity. i.e., some of them drift away from the axle center point, and some of them drift toward the axle center point. In a real-world sprinkler, water normally shoots out of the nozzles with some significant force (as does the water in the inverted sprinkler on the right side of the scene). I'm not sure what difference that would make, but, as you know, it's always best to make a simulation of a natural phenomenon emulate the real world as closely and as accurately as possible.

Quote: the newly spawned water drops at the nozzles have little to no radial velocity.
Response: The radial velocity is now 5 m/s was 1 m/s. The right sprinkler drops have a radial velocity of 15 m/s. Code is in invisible boxes on the sprinkler tubes.

I watched the video too!