Tom Crawford (sporting a Navier-Stokes tattoo) talks about the famed equations - subject of a $1m Millennium Prize. Part 2 (Reynolds Number): https://www.youtube.com/watch?v=wtIhVwPruwY Part 3 (River Water): https://www.youtube.com/watch?v=5mGh0r3zC6Y More links & stuff in full description below ↓↓↓ Tom Crawford works at the University of Oxford... more at: https://tomrocksmaths.com/ Playlist: http://bit.ly/NavierPlaylist Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. https://www.simonsfoundation.org/outreach/science-sandbox/ And support from Math For America - https://www.mathforamerica.org/ NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Animation and edit by Pete McPartlan Freesound credits: rfhache, nicstage, ashfox, inspectorj Animation of right angle flow: Keaton Burns, Dedalus Patreon: http://www.patreon.com/numberphile Numberphile T-Shirts: null Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9