The idea is to focus the air spread instead of spreading it out...
Check out the youtube video... Looks like an interesting idea.
http://www.lepatek.eu/vortex/
http://www.techwarelabs.com/lepa-vortex-pwm-fan/2/
Hey,
Long time reader... Just signed up.
Haven't seen this posted here...
Thought this might be of interest.
TTL can you get your hand on one? :)
http://www.gizmodo.com.au/2012/06/brilliant-spinning-heatsink-cools-cpus-30-times-more-efficiently/