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Posted

Will it work? No.

 

Here's why:

 

1. Perpetual machines cannot exist. They are not allowed under the rules by which the universe works.

 

2. That being said, here is why your particular design fails.

 

Buoyancy is due to the pressure difference across the object. The pressure of a fluid (gas or liquid) varies with depth. It is the difference in pressure between the top and bottom of the object that pushes it up leading to buoyancy. No. Here's why:

 

There will also be a pressure difference across the openings between the tanks. When the objects pass from one tank to the other they will experience a force due to this difference.

When the objects through the upper opening (going from high to low density gas) this force helps to push them through, however when they pass through the lower opening (going from low to high density gas) the force pushes against them.

 

Now here's the point:

The difference in pressure for the dense gas varies with depth more than the difference for the lighter gas. This means that the pressure difference between the two tanks at the upper opening is less than that at the lower opening, and you will have more force to push against going from lighter to heavier gas than you get help going from heavier to lighter gas. This difference will cancel out the difference in buoyancy of the objects while rising or sinking in either tank, ending with no net force left over to turn the device.

Posted

Will it work? No.

 

Here's why:

 

1. Perpetual machines cannot exist. They are not allowed under the rules by which the universe works.

 

2. That being said, here is why your particular design fails.

 

Buoyancy is due to the pressure difference across the object. The pressure of a fluid (gas or liquid) varies with depth. It is the difference in pressure between the top and bottom of the object that pushes it up leading to buoyancy. No. Here's why:

 

There will also be a pressure difference across the openings between the tanks. When the objects pass from one tank to the other they will experience a force due to this difference.

When the objects through the upper opening (going from high to low density gas) this force helps to push them through, however when they pass through the lower opening (going from low to high density gas) the force pushes against them.

 

Now here's the point:

The difference in pressure for the dense gas varies with depth more than the difference for the lighter gas. This means that the pressure difference between the two tanks at the upper opening is less than that at the lower opening, and you will have more force to push against going from lighter to heavier gas than you get help going from heavier to lighter gas. This difference will cancel out the difference in buoyancy of the objects while rising or sinking in either tank, ending with no net force left over to turn the device.

 

Janus, thank you for this information

 

 

 

 

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