The Kármán vortex street
A unique phenomenon in fluid dynamics where swirling, repeating pattern of vortices are formed by an unsteady flow around a blunt body. These vortices are commonly seen in clouds downwind from islands and mountains breaking up the flow. These become problematic for skyscrapers and industrial chimneys, some of which are build with special modifications to specifically break up this flow.
Some vortices can cause vibrations at a similar frequency to the natural frequency of a structure, causing resonance. Occasionally this will make suspended wires and power lines “sing.”
Some insects, such as bees, actually use these eddies to counter drag and give themselves a little boost. By rotating their wings just before the downstroke they catch some of the upward draft, giving a small boost to their speed and maneuverability.
bringin this back for the nails
- John Mulaney (via ntrvrts)
every time someone talks about how violent and awful rap music is, i’m like, i can definitely name like 20 rap songs off the top of my head about insecurity, suicidal thoughts, abuse, drug addiction, abandonment, and lots of other vulnerable topics but that’s probably because i’m not a racist fuck with my head so far up my ass that all i hear is the shit from my own colon.