Naked Science Forum

General Science => General Science => Topic started by: stragen on 15/09/2005 19:08:57

Title: Walking on non Newtonian liquids
Post by: stragen on 15/09/2005 19:08:57

I understand that it is possible to walk on a non newtonian liquid, such as custard, as when you impact the surface it forms a solid column underneath you.

How does this work? Why dont you just sink in like you would with thick mud, and if it forms a solid column, why doesnt this dissipate into the non solid liquid around it?



42....?

Title: Re: Walking on non Newtonian liquids
Post by: daveshorts on 15/09/2005 21:29:52

It is because the particles of the cornflour lock together when you compress them fast but the water can work it's way between so they flow if you move more slowly. Have a look at:
http://www.chaosscience.org.uk/dem/public_html/article.php?story=20030925150035401&query=cornflour
Which I wrote a while ago.

Title: Re: Walking on non Newtonian liquids
Post by: stragen on 15/09/2005 21:40:27

Nice....thanks [:)]

42....?