Timeline for magnetic refrigeration and adiabatic processes
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 27, 2018 at 19:02 | comment | added | creillyucla | Thus my question all along was "Is there an experimental method to verify the adiabaticity of some process besides simply preventing all known forms of heat transfer?" What prevents someone from associating any process which results in a temperature increase in a subsystem with some unknown form of heat transfer from the environment to the subsystem? | |
| May 27, 2018 at 3:54 | comment | added | Deep | @creillyucla If you are not sure that all forms heat transfer have been prevented, then you shouldn't be making the statement that it is well insulated. Whether all modes of heat transfer have been prevented in an actual experiment is for you to verify, not a question that I can answer. If you want to know how heat transfer occurs and how to prevent it, then read a good engineering book on heat transfer (e.g. Cengel and Ghajar). | |
| May 26, 2018 at 18:44 | comment | added | creillyucla | By insulated I mean that we can rule out conduction of heat via the air surrounding the magnet. But we know that there are other mechanisms of heat transfer (radiation for example). How do we know that the temperature rise observed in the magnet is not due to some unaccounted form of heat transfer? What additional tests would you perform on the system to demonstrate that no heat was transferred to the magnet? | |
| May 26, 2018 at 17:58 | comment | added | Deep | @creillyucla You said "...we have a magnetic material that is well insulated from its environment..." Everything other than the magnetic material, in particular the coil, belongs to the environment. | |
| May 26, 2018 at 17:05 | comment | added | creillyucla | Suppose the Helmholtz coil was hotter than the magnet | |
| May 26, 2018 at 5:02 | history | answered | Deep | CC BY-SA 4.0 |