Fluid gears: Active and passive rotors submerged in glycerol-water solution power active cylinder to spin creating a fluid vortex

https://www.nyu.edu/about/news-publications/news/2026/january/scientists-put-teeth-into-water-driven-gears.html

"no: wear, misaligned/ damaged gear teeth jamming mechanism... vortex exerts force on nearby passive cylinder, which then rotates without physical contact... rotors: further apart, spin in same direction, higher speed... flip rotation direction/ adjust speed ratios by changing distance between cylinders or active rotor's speed... durable, versatile, precise alignment/ spacing less critical... furthers: soft robotics and mechanical devices that are more resilient and adaptable than those using traditional gear designs"