Alien Invasion - I want my pond back !

[dave1949]

That pretty cool Eric. Well done!

See any sign of Jimmy Hoffa? :laughing:

 

[MossRoad]

Interesting video but it doesn't prove that a siphon will work in a vacuum in my opinion. They are not using 'water'. They are using an ionic liquid, a type of 'liquid magnet' as they explain it. So its more akin to using a chain in a vacuum, and of course a chain will respond to gravity. They are not really creating a siphon at all.

My guess is that a true siphon really does use air pressure to push water up the tube. The air pressure at the lower end is not important. The low pressure is created by gravity INSIDE the tube as the water tries to separate from itself, hence creating a vacuum or suction inside the tube. So a true siphon requires atmospheric pressure AND gravity.

Your saying siphons blow and science says they suck...

 

[MossRoad]

The long rise side is like an ideal inclined plane - frictionless. Gravity acts proportional to the sine of the angle. ... Less than 1 on the rise, but 1 on the vertical fall.
...Any fall greater than the rise will flow to the fall.

Have you gotten out your clear hose two buckets and a camera yet? Would love to see your results.

 

[MossRoad]

In my experience, a siphon doesn't care about the slope on either end or the amount of hose under water. It just cares that the discharge end is below water level and the further below water level the discharge end is, the more flow comes out of the discharge.

Aaron Z

You're absolutely correct. However, the question is can the uphill side of the hose be longer than the downhill side of the hose from the top of the water level?

 

[SPYDERLK]

Have you gotten out your clear hose two buckets and a camera yet? Would love to see your results.

No you wouldnt because they would just support physics.
,,, Prove it to yourself. If it doesnt work post good pictures and Ill tell you what you did wrong.

 

[aczlan]

You're absolutely correct. However, the question is can the uphill side of the hose be longer than the downhill side of the hose from the top of the water level?

As long as the total fall is greater than the total rise and the outlet is lower than the water level it should siphon water.

Aaron Z

 

[alchemysa]

Well I must admit I'm surprised at how fast its draining.

But now I'm really looking forward to the bogged tractor pics.

 

[MossRoad]

As long as the total fall is greater than the total rise and the outlet is lower than the water level it should siphon water.

Aaron Z

Exactly! What's pretty revealing is to take two glasses of water, put a water filled clear plastic tube into them and then lift one up and watch it fill the other, then lift the other and watch it go back. Note that the upstream side of the hose is always shorter than the downstream side as measured from the level in the containers. As you mention, the length of hose under the level of the fluid is irrelevant.

Here's yet another video showing how it works. :laughing:

https://www.youtube.com/watch?v=CZmP0vsRBZ8

 

[MossRoad]

No you wouldnt because they would just support physics.
,,, Prove it to yourself. If it doesnt work post good pictures and Ill tell you what you did wrong.

I've given numerous examples to support my position. You've given none. :dance1:

 

[4570Man]

I went outside and tested this, and I was surprised with the result. The up side was 15-1/2 feet long, and the down was 7-1/4 long. I ended up with a wet driveway, and an empty Yeti.