Anybody got any ideas WHAT fluid this is? :eek:
http://www.youtube.com/watch?v=f2XQ97XHjVw
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Anybody got any ideas WHAT fluid this is? :eek:
http://www.youtube.com/watch?v=f2XQ97XHjVw
They filled a pool with a mix of cornstarch and water made on a concrete mixer truck. It becomes a non-newtonian fluid. When stress is applied to the liquid it exhibits properties of a solid.
Let a fluid be traveling in the http://scienceworld.wolfram.com/physics/nimg190.gif direction with velocity u(y). A Newtonian fluid is one for which the strain rate
<table align="center" width="100%"> <tbody><tr valign="middle"><td align="center" nowrap="nowrap">http://scienceworld.wolfram.com/physics/nimg192.gif</td> <td align="right" width="10"> (1)</td></tr> </tbody></table>is equal to the vertical velocity gradient
<table align="center" width="100%"> <tbody><tr valign="middle"><td align="center" nowrap="nowrap">http://scienceworld.wolfram.com/physics/nimg193.gif</td> <td align="right" width="10"> (2)</td></tr> </tbody></table>As shown in strain rate, this also implies
<table align="center" width="100%"> <tbody><tr valign="middle"><td align="center" nowrap="nowrap">http://scienceworld.wolfram.com/physics/nimg194.gif</td> <td align="right" width="10"> (3)</td></tr> </tbody></table>so
<table align="center" width="100%"> <tbody><tr valign="middle"><td align="center" nowrap="nowrap">http://scienceworld.wolfram.com/physics/nimg195.gif</td> <td align="right" width="10"> (4)</td></tr> </tbody></table>Experimentally, a large number of fluids are found to exhibit this behavior. The shear stress, which is linear in the strain rate with a constant of proportionality known as the dynamic viscosity, is then
<table align="center" width="100%"> <tbody><tr valign="middle"><td align="center" nowrap="nowrap">http://scienceworld.wolfram.com/physics/nimg196.gif</td> <td align="right" width="10"> (5)</td></tr> </tbody></table>The viscous force between layers of fluid is therefore
<table align="center" width="100%"> <tbody><tr valign="middle"><td align="center" nowrap="nowrap">http://scienceworld.wolfram.com/physics/nimg197.gif</td> <td align="right" width="10"> (6)</td></tr> </tbody></table>where http://scienceworld.wolfram.com/physics/nimg29.gif is the dynamic viscosity which is assumed to be independent of u.
Yeah, anyone can cut and paste :p But what does it mean?
It means its mud made from cornstarch instead of good ole dirt.
Its chemistry name is Oobleck. Absolutely great experiment to do with kids (outside)
What kind of dill would fill their pool up with mud?
Am I missing something here?
Shouldn't Shedhand's post be in Open Slather :confused:
Richard
course not,Quote:
Originally Posted by Daddles
if'n the mods don't unnerstand it why ban it? :p
Had a look around youtube at the similar vids.
This one is awesome http://www.youtube.com/watch?v=WnDKOc0Ag28
basicly there are five types of fluidQuote:
Originally Posted by silentC
ones like air
ones like water and oil
thixotropic ones that look solid but turn liquid when shaken (quick sand is possibly the most common)
non-newtonian ones that look liquid but behace like a solid when stressed
of course the most important type are the alcoholic ones
ian
Just a mix of cornstarch, eh? I can see my li'l bros is gonna kill me when he see what I'm gonna do to his nice 16" honeycomb mid-ranges...
But it should be interesting until then. ;):D
hehehehe you evil bugga...:D:D:DQuote:
Originally Posted by Skew ChiDAMN!!
PS: I have absolutely no clue as to what the chicken footprints mean. I think a guy named Jesus might have invented it......;)
:rolleyes:
I wonder if Corn Starch is the same as Corn Flour :confused:
When I saw the vid I immediately thought of thixotropi liquids as being the exact opposite of the vid.Quote:
Originally Posted by ian
When I worked in Bougainville, the entire mine site had been under a layer of fine volcanic tuff (like a fine clay). Around the place this stuff used to be heaped up by earthworks and soaked by the frequent rain. Looked like a heap of dirt until a truck when past, and the heap would collapse and flow like a liquid.
Now for the $64 question....
is Strawberry Jelly a solid or a liquid ? :p