Kind: captions
Language: en
so today I'm going to do everyone's
favorite non- neonian experiment I'm
going to put this corn starch and water
solution on this speaker but I want to
do this scientifically so I'm shooting
it with a high-speed camera and I'm
going to vary the frequency and the
amplitude and see what factors really
give us the best cornstarch monster Co
nice still very much looks like a liquid
at this point but as I increase the
amplitude you can kind of tell that it's
not moving as as smoothly as it should
anymore you can see at this amplitude it
starts to jump around a little
bit now I want to try to increase the
frequency and see what effect that has
we are now at about 20 HZ which is the
frequency recommended by some scientific
papers that have studied this phenomenon
going to up the amplitude a little
bit that is incredible that is
awesome
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I'm going up to about 22
Hertz seeing nicer
structures but it's really tough to tell
because it's somewhat random sometimes
it just turns into a blob like that
other times you get some really cool uh
things for me I'm at about 34 Herz here
we're not seeing a lot of structure
sure seems like at these higher
frequencies it just sort of turns into a
blob it's interesting how it becomes
more coherent and smoother actually at
the higher
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frequencies
wow that's interesting in the highs
speed you can clearly see that the
inertia of the thing is keeping it off
the speaker entirely that's really cool
so it's just getting kind of bumped with
that frequency it's not really sticking
around that's why you probably need a
lower
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frequency
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who well that's the end of
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that
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he
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so how do non- neonian fluids work well
the corn starch in water is really a
suspension that is these tiny little
grains of starch suspended in water so
when you try to move that fluid slowly
the starch has time to get out of the
way of each other because it's
lubricated by all those water molecules
in between but if you try to get it to
go fast and that is there's a lot of
Shear which means there are some places
that are going fast fter than others
well then all of the starch grains kind
of get stuck up against each other and
they can't flow past each other so at
that point it becomes like a solid and
less like a liquid you know this kind of
reminds me of traffic in La where I've
been recently if there are not that many
cars on the road it's basically like
having a small amount of starch
particles in your water and everything
flows very smoothly but as soon as you
get the rush hour and you have some cars
which are trying to floor down the
highway plus there's all of these cars
which are like our starch particles on
the highway then suddenly everything
gets clogged and you're basically in
what is a solid so traffic might be an
example of something that's a non-
neonian fluid it flows very well when
there aren't very many particles or when
it's going quite slowly but as you try
to increase the number of cars and go
really fast then everything kind of gets
clogged
up