Difference between revisions of "The challenge of high speeds near nanoscale"
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| − | '''Disclaimer:''' This page is not about feasibility analysis of [[advanced productive | + | '''Disclaimer:''' This page is not about feasibility analysis of [[advanced productive nanosystem]]s like [[gemstone metamaterial nanofactories]]. <br> |
Such systems propose very low speeds in the few mm/s range. <br> | Such systems propose very low speeds in the few mm/s range. <br> | ||
This page is about speculating over some exotic potential application cases <br> | This page is about speculating over some exotic potential application cases <br> | ||
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[[Superlubricity]] is only about static friction being zero. <br> | [[Superlubricity]] is only about static friction being zero. <br> | ||
| − | Dynamic friction actually grows quadratically with | + | [[Dynamic friction]] actually grows quadratically with speed making higher speeds a challenge. <br> |
'''Strategies for somewhat higher speeds:''' | '''Strategies for somewhat higher speeds:''' | ||
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== Related == | == Related == | ||
| + | * [[Limits of power density imposed by limits of cooling]] | ||
| + | ---- | ||
* [[Energy transmission]] ([[Mechanical energy transmission cables]], [[Thermal energy transport]]) | * [[Energy transmission]] ([[Mechanical energy transmission cables]], [[Thermal energy transport]]) | ||
* [[The limits of cooling]] | * [[The limits of cooling]] | ||
Latest revision as of 19:37, 15 September 2024
Disclaimer: This page is not about feasibility analysis of advanced productive nanosystems like gemstone metamaterial nanofactories.
Such systems propose very low speeds in the few mm/s range.
This page is about speculating over some exotic potential application cases
that are pushing the limits of what is possible possible and as part of that would need much higher speeds.
Superlubricity is only about static friction being zero.
Dynamic friction actually grows quadratically with speed making higher speeds a challenge.
Strategies for somewhat higher speeds:
- Infinitesimal bearings
- going for gearbearings with rollers avoiding sliding
- if gearbearings then going for bigger gear-rollers eventually microscale or even mesoscale
Strategies for even higher speeds
- Electrostatic levitation (some remnant waviness of the potential shrinking with distance)
- See page "Levitation" for more ideas.
If the aim is high-speed-transport of solid-state cooling-pellets then quality of thermal contact is of concern too.
Electrostatic levitation basically only allows for EM radiative cooling.
Related
- Energy transmission (Mechanical energy transmission cables, Thermal energy transport)
- The limits of cooling
- Electromechanical converter (Power density)
- Hyper high throughput microcomponent recomposition
- Rocket engines and AP technology (Carriage particle accelerators)
