Timeline for Will a propeller work in a superfluid?
Current License: CC BY-SA 3.0
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| Feb 11, 2017 at 13:05 | comment | added | Deschele Schilder | @JDlugosz-I asked a same kind of question about the movement of a piece of metal through a fluid without viscosity (a superfluid). I thought at first the metal would be stopped by the fluid, which turned out not to be true. No momentum is transferred to moving objects, wich is not to say that the laws of Newton don't work in a superfluid. It's because the laws of Newton hold that there is no driving force. It's like a rotating propeller in outer space. | |
| Feb 11, 2017 at 12:49 | comment | added | Deschele Schilder | @ruakh-No. A peristaltic pump is not an object that is in its entirety submerged in the superfluid. It's completely around the fluid. There is no energy exchange between the fluid and the mass of the pump, though. You can compare it to a superfluid in a plastic ball. As you throw the ball away then, of course, the fluid in the ball will acquire kinetic energy. | |
| Feb 11, 2017 at 10:52 | comment | added | JDługosz | Can you include some reference for that? E.g. how do I determine whether the assertions made by this post or peterh’s is correct? | |
| Feb 11, 2017 at 6:05 | comment | added | ruakh | Does that same argument imply that peristaltic pumps wouldn't work, either? | |
| Feb 11, 2017 at 5:15 | history | answered | Deschele Schilder | CC BY-SA 3.0 |