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Old Feb 28th 2018, 12:50 PM   #1
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Majic Fountain

I show the initial state then the "in operation." What's the simple
answer why this goes?

Majic Fountain | THERMO Spoken Here!

Thanks, JP
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Old Feb 28th 2018, 06:00 PM   #2
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Not quiet sure what this is ... Are you saying this magic fountain runs without an apparent input of energy ???

If so , then the input comes because the reservoir is open to the atmosphere , evaporation will occur cooling the water in A , which is drawn down to C ...the enclosed air C and B will now be colder .. drawing heat from the outside which powers the device ... I guess !

The dryer the outside air , the better it should work .

Forget all of the above ... I misread the illustration... It seems you are lifting one of the containers .... well sure you will get some action , you have put some potential energy into the system which is transmitted via changes in pressure in the pipe work.
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Old Mar 13th 2018, 03:36 AM   #3
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Originally Posted by THERMO Spoken Here View Post
I show the initial state then the "in operation." What's the simple
answer why this goes?

Majic Fountain | THERMO Spoken Here!

Thanks, JP
Water from A wants to drop into container B due to the gravitational term of the Bernoulli equation (pressure difference). However, because the bottles are sealed, if water drops from A to B, air is pushed from bottle B to bottle C, forcing water up the tube in bottle C into A. This presumably occurs because the pressure difference is lower between and A and C than it is A and B, so when the air is forced through the tube, the pressure is difference is greater than than the pressure difference between A and C.

You could probably use Bernoulli's equation to get quantitative estimates for things
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