Blog Search
Archive
Blog Statistics
  • Views: 3628536
  • Articles: 1366
  • Comments: 1026
  • Status: Public
  • Who's Viewing: 4
  • Guest
  • Guest
  • Guest
  • Guest
4 Guests  0 Members
Posted by duddy   May 11, 2016   2988 views

A non-Newtonian fluid is a fluid with properties that differ in any way from those of Newtonian fluids - it changes its viscosity almost instantly under stress, so you can punch it as a liquid and it’ll turn into a solid (watch the video below), and you can literally walk across a pool of it. On the contrary, a Newtonian fluid is defined as the perfect fluid, where its viscosity is influenced mostly by its temperature and pressure. So if you have water at a moderate temperature and pressure, it will continue to act like a liquid no matter how much you punch it. Depending on how you manipulate it, the fluid-like substance can change states from a liquid to a solid, but how this happens has remained a conundrum amongst physicists.

Scientists have discovered that the reason these substances act the way they do is probably due to microscopic particles called colloids. Colloids are particles that have a diameter of between approximately 1 and 1,000 nanometres and that are evenly dispersed in fluids. Colloids are also known as colloidal dispersions because the particles remain dispersed and don't settle to the bottom. Friction between colloids that are suspended in "non-Newtonian fluid" locks them in place, so they become more of a solid than a flowing liquid. When you punch a non-Newtonian fluid, this pushes the colloids closer together, and the liquid between them is forced out, producing resistance that slows them down sufficiently that they briefly lock into so-called 'hydroclusters'. These finding were recently proven in an article recently published in Physical Review Letters (have a read for more details).




physics particles chemistry fluids
Posted in Discoveries
You might also like...
1 Comment | Write Comment
1
cool Slight Smile
Posted on May 25, 2017 by flower
Random Article
   RSS Feed     Atom Feed     RDF Feed