View Single Post
Old 07-06-2019, 02:06 PM
RAMSET RAMSET is offline
Gold Member
Join Date: Mar 2009
Location: NYC and Conn USA
Posts: 1,420
always liked Most of your contributions

glad to see you posting somewhere ,I know there was a ruff time at
Stefan's forum with Wesley's blog spot [his notebook]

I had read there that you work to help Kids understand the "whatifs" ?
and hunt outside the box.

a more noble cause would be hard to imagine .

I know the topic here makes for very strong opinions .
member Evolvingape forwarded these few words for perspective...
and just how much we really still have unknowns or "Whahtifs"
to consider.

NOTE : I post this for perspective in fluid systems , not specific to Cadman's design principle.

the simple siphon [or is it ....?
For much of scientific history, scientists have believed that siphons work because of the force of atmospheric pressure. A basic siphon consists of a tube in a larger container that goes up over a hump (the edge of the container) to empty out into a container at a lower level.

When liquid is sucked through the tube over the hump and begins to empty into the other container, a decrease in atmospheric pressure is caused at the highest point in the tube (where it passes over the hump). This decrease results in the atmospheric pressure on the surface of the liquid pushing liquid up into the tube toward the area of lower pressure.

While the atmospheric pressure theory seems to make sense, some scientists noted that it requires the presence of air. When tested in a vacuum, a siphon still worked, so it seemed that some other force must also be at work.

More recently, scientists who have studied siphons have theorized that the key force is gravity. When liquid is sucked up the tube and over the hump, the force of gravity continues to pull the liquid through the tube. This theory relies upon liquid cohesion, which means a continuous chain of cohesive bonds must exist in the liquid.

Some scientists refer to this as the chain model, because you can think of the water like a chain being pulled through the tube instead of a liquid. When you begin to pull the chain through the tube and over the hump, gravity will take over and continue to pull the entire length of the chain through the tube.

Unfortunately, most liquids don't necessarily have strong cohesive bonds to make them act this way. Other scientists have created flying droplet siphons and carbon dioxide gas siphons that feature gas bubbles that exist between liquid molecules.

It may be the case that atmospheric pressure, gravity, and liquid cohesion all work together to make siphons work the way they do. Scientists will continue to study siphons to figure out once and for all how they work.
end snip
IMO these type of experiments or concepts should never be dismissed
as settled science ...

our ability to manipulate the environment around us grows with each passing second.
and persons like Cadman stir that Pot...and encourage more "outathebox"
besides its Funn !!

Chet K

to SL
would be nice to read you in other places too..maybe things can get sorted?
pps as an example member Kator 01 [a wonderful contributor ]
made a comment here on some "plasma cloud" ??

Note : not looking to side track this topic
will remove off topic bits in a few days [or the whole post if requested]
Reply With Quote