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Columbia Engineers Demonstrate Bubbles of Sand
Posted on 5/12/19 at 12:16 am
Posted on 5/12/19 at 12:16 am
LINK
The study, published today in the Proceedings of the National Academy of Sciences, is the first to demonstrate that “bubbles” of lighter sand form and rise through heavier sand when the two types of sand are subject to vertical vibration and upward gas flow, similar to the bubbles that form and rise in lava lamps. The team found that, just as air and oil bubbles rise in water because they are lighter than water and do not want to mix with it, bubbles of light sand rise through heavier sand even though two types of sand like to mix.
Development of a "bubble" of lighter sand (blue) forming in heavier sand (white).
The video in the link is really cool to watch.
The study, published today in the Proceedings of the National Academy of Sciences, is the first to demonstrate that “bubbles” of lighter sand form and rise through heavier sand when the two types of sand are subject to vertical vibration and upward gas flow, similar to the bubbles that form and rise in lava lamps. The team found that, just as air and oil bubbles rise in water because they are lighter than water and do not want to mix with it, bubbles of light sand rise through heavier sand even though two types of sand like to mix.
Development of a "bubble" of lighter sand (blue) forming in heavier sand (white).
The video in the link is really cool to watch.
Posted on 5/12/19 at 12:30 am to DavidTheGnome
So you're saying different types of sand don't really want to integrate?
Posted on 5/12/19 at 2:51 am to DavidTheGnome
Just like salt migration
Posted on 5/12/19 at 4:49 am to DavidTheGnome
I guess it’s good that they took a scientific approach and tested an hypothesis, but is there anyone on earth that is surprised by the result?
Posted on 5/12/19 at 5:01 am to DavidTheGnome
fricking Engineers.
“Bubbles in sand” becomes “Gravitational Instabilities in Binary Materials”.
“Bubbles in sand” becomes “Gravitational Instabilities in Binary Materials”.
Posted on 5/12/19 at 6:07 am to DavidTheGnome
This makes lightning sand less inconceivable.
Posted on 5/12/19 at 8:31 am to dkreller
They could have just watched a gold panning show on TV and known this.
Posted on 5/12/19 at 9:19 am to DavidTheGnome
Oh man, now I can sleep at night...
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