I'd like to have Hazou run some experiments on Usamatsu's Glorious Life Saving Purifier, don't mind if it happens off screen.
Basically, I want to hammer down what is physically going on:
Does it seal all particles in the cone (instantly), pause, unseal from second outlet (instantly) creating double dense air instantaneously?
- if this, we have an interface of vacuum to air that violently contracts at the speed of sound from all directions (lots of energy lost to viscosity/turbulent mixing, haven't checked how the shock behaves)
- can accelerate items at interface with clever synchronizing of two+ seals
- after first cycle, air is captured only as it enters the interface, resulting a estimable (stepwise) steady flow
- Length of pause is research avenue
Same as above, replace (instantly) with (over small time increment)
- how small? Answer determines size/strength of vacuum. Too large of an increment, and most of the purpose of the seal is lost
- solid surface at base of cone makes vacuum easier
- time increment is research avenue.
Does it change all gas particle momentum to point toward the seal, so it suctions up only the particles that enter the cone?
- vacuum again possible, as long as a solid surface blocks at the far end of the cone
- synchronized duty cycles make vacuum last.
Does it ramp the volume up and down during start and end? This would eliminate any concern for shocks at the end, and would help explain the "explosion" after sealing failure.
Reasons why the idea hasn't been thought of before
- synchronicity of seals is non obvious.
- Usamatsu's seal is not widely known (was a sealing professional that Jiraiya knew in his lifetime, who's naming conventions earns derision)
- mechanism to hold seal in front of object not obvious. If you fail to do this, debris may come and shred the seal.
- common use case doesn't suggest anything like using vacuums for anything, people may have dismissed the effect as a quirk of the seal
The seal has to empty the cone reasonably quickly and regularly, in order to purge toxins.
@Community, before I pester the GMs, is there anything I'm missing, options I've omitted? I don't mind retcon of the seal, I just want to know how it works. Each of the above scenarios should be easily testable, in some fashion or another.
Edit: and would point us to how it actually works, if none of these are right.
Depending on how Usamatsu's Purifier seal actually works, we could do really interesting stuff with it. Testing to figure it out should take on the order of a couple days (Because we have it, don't need to add anything to it - just want to rest how it works. (Heck, Kagome probably knows a lot of the answers that we do not, in thread)
- what happens if we have two intake seals with overlapping cones?
- how rapid is a rapid burst of suction?
- is the current understanding (absorb all gas in cone, in rapid burst) valid?
@OliWhail @Velorien @eaglejarl
I'm not sure how firmly you have nailed down Usamatsu's seal, and would be glad to offer what insights I have from fluid dynamics - I wouldn't mind a change in the current description of the seal, so long as it fits your intent when you designed it.
If I were to describe my guess at the seals function, based on other known seals (have we seen it on screen? I know Hazo has seen it working, but I don't think we have):
Upon activation, a small cone of air is immediately absorbed over a short period, and then the seal switches to expel over the same period.
A light thwopping sound is emitted as the gas particles near the seal impact and form a relatively weak shock (where the cone comes to a point) next burst occurs before substantial shock formation.
The size of the cone expands during every suction period, so that the flow rate through the seal never exceeds the design point.
The size stabilizes at the design point (3 meter cone), and cannot exceed 3 m
I expect the transition (small to stable) would be very fast, but won't bother with calculations until we affirm that this is roughly on track.
Upon termination, the seal contracts the size of the cone over a small number of cycles, eliminating the noise generated by the whole 3 meter cone collapsing at once.
2 overlapping cones have no substantial effect, other than clearing particles out faster in the overlap (suction period would be the same) - output sides would have less throughput.
I assume suction is used to describe the sucking sound, and the feeling of air being pulled into the vacuum-cone over short bursts, and not a process of actually transporting molecules toward the seal (more bizarre effects probably happen in this case)
Please let me know what you all think! I'm trying to reconcile rapid burst sucking in all gas in a volume, and the general assumptions in thread.
