Pumpkin Seed Effect - Solid, Solid Water Jet Mixing - F-J's Physics - Video 176
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- Опубликовано: 15 сен 2024
- Is this a new effect? Does it have any industrial applications? Here I demonstrate what I call the 'Pumpkin Seed Effect' a way of mixing solids using water jets.
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It seems to me the large surface area compared to the mass of the pumpkin seeds make them especially good to demonstrate this effect, which may be why the plastic chips didn't work as well.
Also the shape of the seed would make it a lot more likely to intermix thoroughly where a non ovoid may not mix as well.
Thanks. I think you are totally right. Different densities at play too. It was not meant to be too scientific but just a bit of fun but, as you point out, there are some very interesting variables at play here. Thanks for watching and taking the time to comment. Much appreciated!
Could it be the bowl shape of the colander, try repeating the experiment with a plastic sweet container with lots of holes drilled in the bottom and sides. Thanks for another interesting video
Yes, Anthony. The curved nature of the base must really help with the flow channeling. Would make a good school project (we used to have to do them for A' Level) as there are lots of variables. Wouldn't it be fun to do with actual sweets that slowly dissolve!
This is not (in a general sense) a new effect at all, it is an example of fluid bed mechanics and is already used for mixing and conveying granular and particulate materials, usually with the fluid being air instead of water.
I work for a company that does air jet milling; we process a lot of abrasives and pigments for some pretty well known clients, as well as (literal) tons of material for batteries. The machines we use have multiple (2 or 3) jets all directed into the center of a chamber, creating colliding vortices of the sort you show here. A stream of bulk material (powder or granulated, even chunks as big as those seeds or larger) enters the chamber, swirls around and self-pulverizes (allowing us to process some very hard materials) and then there is an outlet at the top of the chamber where particles that are fine enough to become airborn are either pushed back by a centrifugal blower, or if fine enough to pass with the air are conveyed to a collector.
Seb, thanks so much for this. I should have thought about fluid bed systems - I have seen them used with coal powder. I have not yet seen it done with a liquid as the fluid but I am sure it is out there somewhere! It was all a bit tongue in cheek as you know but thanks so much for your comments. I am a very great believer in real world uses being used to explain physics and yours are excellent. Many thanks for taking the time to comment so fully and for watching.
The Barry Effect
Yes, David! I think that's the answer!