Timeline for Will a propeller work in a superfluid?
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 22, 2018 at 21:48 | comment | added | Vendetta | So, basically, you made a super bad liquid helium heater? | |
| Apr 13, 2017 at 12:40 | history | edited | CommunityBot |
replaced http://physics.stackexchange.com/ with https://physics.stackexchange.com/
|
|
| Feb 11, 2017 at 13:51 | comment | added | mmesser314 | @Davidmh - Just once. I am sure it was an expensive lab, but it was a great day. We made nitrogen and oxygen snow out of air. We put LHe in a porous clay cup. The holes were microscopic, so surface tension prevented it from leaking out the bottom. Below the critical temperature, it just poured through. We did it again with a non porous cup. Below the critical temperature, it climbed over the top and just poured off the bottom. These days you would just watch it on the internet. | |
| Feb 11, 2017 at 7:24 | comment | added | Davidmh | I am impressed that you had access to superfluid helium as an undergrad. | |
| Feb 10, 2017 at 19:41 | comment | added | mmesser314 | @DanielSank - I forget. Magnets? | |
| Feb 10, 2017 at 19:20 | comment | added | DanielSank | How did you spin the props while they were submerged? | |
| Feb 10, 2017 at 14:23 | history | edited | mmesser314 | CC BY-SA 3.0 |
added 465 characters in body
|
| Feb 10, 2017 at 14:12 | comment | added | JMac | It would be good if you clarified that in the answer then. The way you have it worded now contradicts itself unless you mention that it wasn't in a pure superfluid. | |
| Feb 10, 2017 at 14:10 | comment | added | mmesser314 | You are right. It worked much less. So poorly that the best answer is no it didn't work. As physics.stackexchange.com/q/311115/37364 says, it has two components. The normal component was responsible for the residual viscosity. If we had reduced the temperature, there would be a smaller fraction of normal component, and less viscosity. | |
| Feb 10, 2017 at 14:07 | comment | added | JMac | Your answer is no; but your anecdote is yes. If it slowly started to turn, it was working to some extent; although the power transmission may have been incredibly small. | |
| Feb 10, 2017 at 14:05 | history | answered | mmesser314 | CC BY-SA 3.0 |