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Microwaves can in principle control temperature from inside of
a
body, and ultrasound has been shown to be able to "control the
rate of
crystal growth, ensuring small and even-sized crystals are
formed, and can prevent fouling of surfaces by the newly
formed
crystals" (link).
A simple
idea would be to combine the two, in order to slowly
traverse the crystallization barrier with minimal damage, but I
didn't find any attempts to that.
innovativeultrasonics.com
http://www.innovati...ns/crystallization/
[Mindey, Apr 03 2016]
EM radiation as crystal catalyst
vaguely related [xaviergisz, Apr 06 2016]
Effects of Magnetic fields on freezing.
https://onlinelibra...111/1541-4337.12202
[Mindey, Nov 05 2019]
[link]
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// Microwaves can in principle control temperature from inside of a body // |
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Do you mean a living human body by any chance ? |
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Do you understand the properties of microwave radiation and the importance of Specific Asorbtion Ratios ? |
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If not, this idea is going to end badly. |
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I'll just "wave" as you go by... |
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//Microwaves can in principle control temperature
from inside of a body// I don't think you meant to
say what you think you said. |
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[8th of 7], very good point, this idea would probably
bake non-uniformly, though pattern randomization,
and entropic heat transfer to colder regions, at low
power, would help. |
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[MaxwellBuchnan], yes, the word "control" -> "increase
temperature" through microwave absorption. Or is
there something else that bothers you? |
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[normzone], I would consider this is the dumbest idea I
had ever come up with, but I would still find it
interesting to see what happens if you freeze, even a
cup of water while running ultrasound, and reducing its
refrigeration rate with low power randomized pattern
microwaves. |
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While you can reduce the ambient temperature very
slowly without microwaves, introducing microwaves in
low powered randomized pattern unfreeze at random
locations, and maybe let some of the tensions within
ice to even-out before they result in fractures. |
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So, I would consider this baked, if experiments of
freezing at least a glass of water with different
microwave and ultrasound patterns to see if you can
control where the fractures occur, and how uniformly it
freezes using these means... and maybe you would
want not just ultrasound, but sound with more diverse
wavelengths. |
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Skip the microwaves. If it's tissue, use pumped fluid to control temperature. If it's a semisolid or liquid with no veins, you might be able to use a large pressure cylinder to shift temperature to some extent. If that's useful. |
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And the use of ultrasonics is a really good idea. Regarding freezing a cup of water, you would probably get really clear ice. Presently for making ice blocks for ice carving in large freezers, I believe they de-gas the water as much as possible and I believe sometimes people circulate the freezing water so it's flowing water that's freezing onto a large floating crystal. I imagine ultrasound would be easier to manage then trying to run a water pump in a freezer. |
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Cryo-cymatics sounds so much more than cool. |
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It is possible I might have thought of microwaves+freezing
to customize crystal growth as regards to tissue (and body)
cryogenics. A better frozen head... |
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Another application could be improved activated carbon
(charcoal) They soak charcoal with an ionic solution, let it
crystallize then wash it out. With carefully sized
microcrystals it could have even higher surface area. |
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