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Bouyancy depends on the average density of the media
surrounding the body. So air plus metallic particles can be made
to be a little more dense than a persons body. Blow air through
the particles and then the person can swim.
Fluidized sand. SmashLab
Skip to 00:40 if pressed for time. [2 fries shy of a happy meal, Aug 29 2014]
||I wouldn't want to put my head under but would like
to try it in a sensory deprivation chamber. A black
||Need a dust mask or better, to protect the lungs from this.
||No. Fluid dynamics indicates that the person will
immediately sink to the bottom as they will exhibit
dynamic density greater than air while the metal dust
exhibited only partial fluid behavior.
||I'm not so convinced...
First of all, the video is showing partial submergence.
That is expected, because, with possible exception of
one guy, no one can walk on fluid without displacing an
Secondly, the only references I can find, on fluid
dynamics in fluid beds, refers to small particles which
I still think that large objects will react according to
equivalent bulk density, unless someone can point out
any strange other behaviour.