Comment by snow_flake
8 hours ago
The phys.org article and headlines are misleading, the authors did not investigate systems to actually transmit torque. From what I gather, the interesting findings are the parameters for co-rotation and counterrotation of the driving and driven cylinder, depending on the Reynolds number, distance and so on. To illustrate one of the images of their publication: https://i.imgur.com/m8P2iVw.png
But these things exist though. https://en.wikipedia.org/wiki/Fluid_coupling
That would make much more sense then what the article seems to imply (scientists reinvent a 100 year old torque converter! But worse!!). Of course that headline isn't nearly as fun (scientists develop better model for fluid dynamics in torque converter).
Can someone suggest a better (i.e. more accurate and neutral) title?
Mapping out How Fluid Mechanical Spin-coupling Interactions Depend on Proximity, Confinement, and Flow State
Alternate: New Ways to Understand, Control, and Exploit Hydrodynamic Spin-spin Interactions in Applications
The article doesn't really deliver on either headline, but that's the fault of the article, not the study.
The limit is 80 chars and I'm not sure how to squeeze those in. I've taken a crack at something simpler in the title above. Does it work?