The Four Dimensions of Fluid Mechanics
Governing Equations
So Many Names

Turbulence on a small scale -
vortex burst in an F-18 scale model water tunnel test.

Turbulence on a galactic scale - giant "twisters" in the Lagoon Nebula as viewed by the NASA Hubble Space Telescope (HST). Image reveals a pair of one-half light-year long interstellar "twisters" -- eerie funnels and twisted-rope structures -- in the heart of the Lagoon Nebula (Messier 8) which lies 5,000 light-years away in the direction of the constellation Sagittarius. Image from the National Space Science Data Center - Credit: A. Caulet (ST-ECF, ESA) and NASA