Difference between revisions of "Scaling laws by degree of knownness"
From apm
(→Somewhat known: added explanation to constant speeds across scales and note on more speed related dissipation scaling lasw: unwritten page Accidental heatpump bearing) |
|||
| Line 12: | Line 12: | ||
More details here: | More details here: | ||
| − | * [[Same absolute speeds for smaller machinery]] | + | * [[Same absolute speeds for smaller machinery]] <br> Usually formulated indirectly by stating that machine frequencies rise linearly with falling size. |
Not a size but a speed scaling law: | Not a size but a speed scaling law: | ||
| − | * [[Hundredfold smaller frictionlosses from tenfold slowdown]] | + | * [[Hundredfold smaller frictionlosses from tenfold slowdown]] <br> There might still be dissipation mechanisms that scale differently. <br>See: [[Accidental heatpump bearing]] |
== Very poorly known (but very important) == | == Very poorly known (but very important) == | ||
Revision as of 17:25, 15 August 2023
Contents
Very widely known
ATM barely any descriptions on the listed pages here. Most is on page: Scaling law.
I advise visiting any of the countless sources on the web for details.
- Twice the surface area of half the volume
- Thousandfold lower mass of tenfold smaller machinery
- Twice the frequency of half sized machinery
Somewhat known
More details here:
- Same absolute speeds for smaller machinery
Usually formulated indirectly by stating that machine frequencies rise linearly with falling size.
Not a size but a speed scaling law:
- Hundredfold smaller frictionlosses from tenfold slowdown
There might still be dissipation mechanisms that scale differently.
See: Accidental heatpump bearing
Very poorly known (but very important)
Less relevant but a bit flabbergasting:
External links
(It's a word: https://en.wiktionary.org/wiki/knownness)
