Heron's Fountain

[Neo-X]

Is this the same principle on self flowing flask?

[conradelektro]

Is this the same principle on self flowing flask?

Well, the self flowing flask is a thought experiment (first published by Robert Boyle in the 17th century) which does not work in reality. Whereas Heron's fountain does work (if set up properly and when refilled /emptied occasionally).

http://deemaland.blogspot.co.at/2008/01/boyle-self-flowing-flask.html

http://en.wikipedia.org/wiki/Robert_Boyle (see at the end of the page, scroll down)

Many contraptions based on water flow can be made to work by applying heat in order to generate natural convection. The necessary energy (which can be very little) comes from the heat source.

Greetings, Conrad

[johnny874]

This past weekend I constructed a Heron's Fountain according to the attached diagram.  I will post a video of it in operation when I get a chance.  This is a really cool project and cost me nothing to build.  It is amazing to see the water lifted higher than the starting point.  More later...

Bill

Instructions I used are here: http://blog.makezine.com/2008/06/08/build-herons-fountain-1/  I modified a few things to fit the materials I had laying about.

  This is funny Pirate88719. My continuously flowing water uses similar mechanics but includes the use of leverage to make it perpetual. TK, told me such things are junk and I should go back to school, lmao   
But I don't play with children's toys anymore.

edited to add; @All, the last comment was aimed at pirate 88719 and TinselfKoala.
  This is something I became familiar with when I went to school for propulsion engineering. The pressures we worked with were up to about 1,320 psi, that's when safeties would lift.
And with myself, what i learned was how to get work from such differences in pressure.
As for bill and tk, they might want to consider reading a book on engineering to get a better understanding of the dynamics involved. You know, how compression creates back pressure but by utilizing another force (gravity), back pressure can be compensated for (by using leverage) to have a system that can take advantage of the energy potential that exists.

[broli]

That's a neat little heron's fountain design.

@Magluvin the suggested concept would be cool if it worked but I doubt it. Heron's fountain is all about pressure differences. I attached an illustration that shows this. You see a green and a red bar in both, these indicate the pressure differences. When one is higher than the other it should tell you something about the flow of things. In the right, your suggestion, the pressure difference is reversed. So what will happen is that the water in the long tube will fall back until its pressure is equal to the length of the red line, which is the pressure of the water column between the surface of the top bottle and middle bottle.

[b_rads]

This past weekend I constructed a Heron's Fountain according to the attached diagram.  I will post a video of it in operation when I get a chance.  This is a really cool project and cost me nothing to build.  It is amazing to see the water lifted higher than the starting point.  More later...

Bill

Instructions I used are here: http://blog.makezine.com/2008/06/08/build-herons-fountain-1/  I modified a few things to fit the materials I had laying about.

Thank you Bill for posting this.  This looks to be great fun and will look at this weekend to try and replicate.  Really looking forward to your video on this. 

Brad S