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Liquid Sand Hot Tub- Fluidized air bed
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- I'm sitting in a hot tub filled to the brim
with solid sand.
(laughs)
This is one of the coolest things ever.
If you take a tub of sand like this,
and then add air in just the right way,
it basically becomes a liquefied soup.
(chill music)
In science, this is known as a fluidized bed.
It's used in industrial applications
such as powder coat painting or in grain silos
to make sure that the grain flows smoothly to the outlet.
(chill music)
With air on, the top surface is nearly frictionless.
It's like an air hockey table.
And then when you cut off the air,
it freezes everything exactly where it's at.
(chill music)
So today I'm gonna show you how to make a simple version
like this yourself.
And then because I became curious what it would feel like
to be fully immersed in something like this,
we made a hot tub sized version.
As you can see from this 60 year old video
from the Royal Institute of Science,
this demo isn't exactly new.
I've wanted to build one for a long time,
but you can find literally no information online
on how to make one like that.
So I started combing through a bunch of patent drawings
for massive industrial sized fluid beds,
and I noticed that instead of one big inlet,
they all had a bunch of small holes to deliver the air.
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