Hydro Differential pressure exchange over unity system.

[Cisco]

@Neptune


Reply 525 on page 35?

[mondrasek]

Just a quick update on what happens if I take 6 in^3 of water out of the model I've been studying.  The Inner Riser looses so much buoyancy that it will begin to sink.  It is now heavier than even the Pod can overcome at the fully extended level that the analysis started from.  BUT, lowering the Pod and Inner Ring only .05 inch back into the water made them buoyant again.

So here is where this method of analysis ends, I think.  I would have to do several iterations to see just where between dropping only .05 inch and not dropping at all that the balance point for floatation of the Pod and Inner Riser exists after removing 6 in^3 of water.

BTW, at this point the Outer Riser is still buoyant.  So everything is not sinking yet and I have not found the half way amount of water volume that needs to be exchanged between two ZEDs of the geometry I am studying.

Just a reminder:  I am studying this geometry because it is made out of commercially available shapes and sizes of acrylic.  It is not designed from any optimization point of view.  But many devices begin with being limited to the materials that can be purchased easily.  Only once they are a marketable device will custom shapes and sizes become economically justifiable.

M.

[TinselKoala]

@Mondrasek> Have you meditated properly upon the Cartesian Diver?

Buoyancy depends on volume displaced; the same "quantity" of air has a variable volume, depending on the pressure; a container containing an air chamber will be buoyant or not, with the same "amount" of air in it, depending on the volume that the air displaces, which depends on the pressure.

The Cartesian Diver's variable buoyancy depends on the pressure transmitted to it by the water it is diving in. If the external container is pressurised somehow, the pressure is transmitted to the volume of air in the Diver, which compresses.... that is, it shrinks.... displacing less volume, so the diver sinks. When the external pressure is relieved, the fluid pressure relieves also, which allows the air in the diver to expand, displacing more water, so the diver rises.

[mondrasek]

@Mondrasek> Have you meditated properly upon the Cartesian Diver?

Hi TK!

Your assumptions are correct.  I have not meditated properly on the e Cartesian Diver.  I have had experience with that device since a child (some 35 or so year ago), but that does not mean I have given it the merit it deserves.  I will try and find the time to examine the physics there ASAP.  I am sure that it teaches more than I "think" I know now.

Doesn't everything?

Thanks again for "hovering".  Sage advice is just that: Sage advice.

M.

[LarryC]

An example of a 4 riser system with exaggerated water/air channel for clarity.

The PRECHARGE shows the lift as 16,065 as shown in the spreadsheet.

The 7% RISE show the lift now as ~ 11,000 due to the loss of head.

The last stage shows the force of ~ 15,000 after the head has been restored by the water inlet.

Of course, this is not how the system works, as it wouldn't wait for a 7% rise to start forcing water, it would be instantaneous.

Regards, Larry