Tom Crawford on the mathematics of where river water goes when it hits the sea. See all three Navier-Stokes videos at: bit.ly/NavierPlaylist More links & stuff in full description below ↓↓↓ Tom Crawford works at the University of Oxford... more at: tomrocksmaths.com Playlist: bit.ly/NavierPlaylist Part 1 (Navier-Stokes): youtu.be/ERBVFcutl3M Part 2 (Reynolds Number): youtu.be/wtIhVwPruwY Rivers with James Grime: youtu.be/TUErNWBOkUM Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. www.simonsfoundation.org/outreach/science-sandbox/ And support from Math For America - www.mathforamerica.org/ NUMBERPHILE Website: www.numberphile.com/ Numberphile on Facebook: www.facebook.com/numberphile Numberphile tweets: twitter.com/numberphile Subscribe: bit.ly/Numberphile_Sub Videos by Brady Haran Animation in this video: Pete McPartlan Patreon: www.patreon.com/numberphile Numberphile T-Shirts: teespring.com/stores/numberphile Brady's videos subreddit: www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: www.bradyharanblog.com/ Sign up for (occasional) emails: eepurl.com/YdjL9