Circulating a fluid at a very high speed in a spiral pipe

[iridiu]

What are the forces you desire. What is the goal here?

To find a way to produce more thrust than this one: Ion Thruster, using only electric current.

 

[iridiu]

What if?

What if the system is splitted in 3 sections: blue, yellow and red?

http://www.2live.ro/demo/sections.bmp

Blue section - fluid flow in this section is constant preserving the velocity vector, the mass in this case comes into pipe and leaves the pipe with the same momentum.
Yellow section - this section is composed by a liquid slug generator (gas/liquid) and a liquid separator.
Red section - the role of this section is to accelerate the liquid slugs. The high momentum of the liquid slugs create considerable force. We have compressibility and pressure wave propagation, so there must be instantaneous net forces in red section.

 

[A.T.]

What if the system is splitted in 3 sections: blue, yellow and red?

http://www.2live.ro/demo/sections.bmp

Blue section - fluid flow in this section is constant preserving the velocity vector, the mass in this case comes into pipe and leaves the pipe with the same momentum.

No. It leaves with the opposite momentum. The velocity vector is flipped in the blue section.

 

[iridiu]

Considering this article: http://www.popsci.com/article/technology/fuel-less-space-drive-may-actually-work-says-nasa and this two videos:





In these rudimentary constructions I acquired a superior thrust force compared with space drive tested by NASA.

 

[CWatters]

In these rudimentary constructions I acquired a superior thrust force...

Thrust or torque? I don't see any evidence in either vid that you have made a reactionless drive. You are rotating the Earth the other way.

No doubt the moderators will be along soon to close the thread.

 

[A.T.]

No doubt the moderators will be along soon to close the thread.

At least it's not magnets again.

 

[A.T.]

If the water circulates one way, the platform will turn the other way. That is just conservation of angular momentum. In the first case the tubes can also transfer momentum.

 

[CWatters]

Just in case he doesn't get it...

 

[A.T.]

Just in case he doesn't get it...
https://www.physicsforums.com/data/attachments/56/56407-7e82b012611c54eaf0a473a00967f957.jpg

In that first case the floating platform reverses the linear momentum of the water, so it's pulled out, and the elastic tubes (which also straighten under pressure) make it swing.

The angular momentum conservation explanation was mainly referring to the second video, with the hanging platform.

Tasks for iridiu:

1) Replace your magic spiral with a straight piece of tube on the hanging platform. Does it change the result?

2) Stop switching the pump on and off. Just let it run until an equilibrium is established, against a significant counter torque of the strings. For this remove the straight piece of the string, and just attach the 4 strings directly to the ceiling. Is the equilibrium orientation with pump running different from the equilibrium orientation with pump off?

 

[iridiu]

I know we do not have the same point of view, but I think there are more forces that manifest themselves simultaneously in the "magic spiral", one is explained here: http://www.google.com/patents/US6321783
Elasticity of the tube is very important, because there is vibration and mechanical resonance.

 

[A.T.]

I know we do not have the same point of view,

It's not a matter of opinion, but of experiment. Why don't you replace the spiral with a straight piece? Any honest experimenter would have done this control test on his own.