Saturday, February 7, 2009

Non-Newtonian Fluid: A Friday Activity

My business partner spends a lot of time surfing the web and finds the most interesting stuff. I don't know how; he just does. Sometime ago he found and shared videos about non-newtonian fluid.

So, this past Friday night, Viv and I thought we'd give it a try.

For those of you that don't know. A non-newtonian fluid is a fluid whose viscosity is not a single constant value, meaning that the relation between sheer stress and strain rate in non-linear.

HUH?!?!

Basically, in regards to our activity, our fluid acted like a solid when struck or abrupt force was applied. When left alone or little force was given it acted as a liquid. Check out this wiki entry if you're interested in more information.

Just in case any parents are interested in trying this, just know this:

  • it's definitely a fun and easy activity to do at home,
  • It's non-toxic,
  • can be very messy, and
  • skip the food coloring. Viv and Pxian's hands will be green for the next week.

The recipe we used was from this blog.

Here's the video from our experience.

2 comments:

Tom said...

green is totally the right color for this experiment......

Silvia said...

Great video! Looks like the kids enjoyed it. :)Thanks for the link to my site. I discovered the food color issue as well, glad you mentioned it in your post.