h a l f b a k e r yA riddle wrapped in a mystery inside a rich, flaky crust
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Ultrasonic heating is used in industry for heating material localy.
I'm proposing to use ultrasonic waves instead of microwaves for the home oven. Its safer for humans. Will only disturb critters. Should be ultra to pet's sonic, and should not be confined to inside the "oven", so even safe for the
bats.
(?) Ultrasonic plastic welding
http://www.staplaul.../c2-ultra/ultra.htm
More info [ConsulFlaminicus, Mar 21 2006]
(?) Ultrasonic Welding
http://www.joiningt.../Library/UW/uw.html
Better info and graphics [ConsulFlaminicus, Mar 21 2006]
how sonic heating works
http://ci.nii.ac.jp/naid/110002359321/en/
A scientific article about how it works. [pashute, Oct 21 2007]
[link]
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Only reference I could find was to using ultrasound to keep a steam mix homogenous for making good crusts on bread. You sure this technology exists? |
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//for making good crusrts on bread// |
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Ultra sonic for domestic pets, but painful and dangerous for non-domestic pets - i.e. rodents, cockroaches, etc. |
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Was shown one at a fab a month or two ago. Heats locally, (high temp) used for mini-imprinting and for welding. |
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Sonication is used extensively in the laboratory world for cleaning and for sonic disruption of cells and thourough mixing of solutions. Also used to degas solutions for certian types of analysis. You might produce VERY localized areas of heating but this is generally due to the shredding of whatever is being sonicated and the resulting friction Otherwise heating is not something that this process does very well at all. i just dont see this working at all. Sonicators already exist for home use in the applications that the technology is applicable. Other heating technologies are far more efficient and effective. And they dont turn your hamburger into mush. |
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/And they dont turn your hamburger into mush./ |
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Whas iz I non't ave any meeh? |
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Translation: What if I don't have any teeth? |
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Sorry but your wrong. [jhom]
will delete until I find the proof, then re-post... |
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//Should be ultra to pet's sonic, and should not be confined to inside the "oven"// Any energy source sufficiently powerful to cook food (or other organic matter, like, say, humans) absolutely *should* be confined to the oven. [-] |
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I look forward to seeig anything that you find. Always interested to learn new things ;-) |
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I use a 20kHz sonicator for lab use. It can heat the hell out of very small viscous solutions. If you want to heat small amounts of ice cream or custard, this would be ideal. [-] |
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I've heard of sonic cooling, but is sonic heating possible? |
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GumBob could you give a source? (link or name of manufacturer) Thanks! |
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Finally a link after some years. Why all the fishbones? Can somebody who fishboned explain what they don't like about the idea? Its fairly simple. Since in the lab you use a sonicator for miniscule and local sonic heating, why not use the same principle, but in large scale, for heating regular soup, or a plate of pasta?
Its probably safer than microwave. |
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I'm made all the more curious by the phrase //strong, harmless magnetic field //. |
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If you see ultrasonic humidifiers, ultrasonic waves convert water into cool mist without actually heating it. |
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Ultrasonic welding is actually friction heating at the contact surface. As such it is relatively efficient. |
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Using ultrasonics to try to heat something generally will be less efficient, becuase you're using induced internal friction, which is going to be less for a given energy input. Regardless of that, you'll only skin heat, because the sound won't penetrate. This might work for liquids, because the induced motion causing the friction will also mix it. It won't work well for solid foods. |
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And ultrasonic humidifiers work by shaking the water to cause it to spray into the air. This would be much higher energy, and probably higher frequency. |
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Of course if you go high enough, then the whole buble fusion thing comes into play if that actually works. |
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I agree with [jhom] and [MechE]. I've heard of ultrasonic
welders (which basically rub two bits of stuff together
until
they melt), and we use ultrasonicators in the lab (as
others
have described) on various suspensions and solutions. In
the
latter case, there is some heating, but not a lot,
considering
the amount of energy being put in. I'm not saying it won't
heat your food, I just don't think it will be very efficient,
at
least from what I've seen. |
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(The paper in the third link talks about using frequencies
of a few 10s of kHz, which is what we use in the lab. I'm
not sure of the heating efficiencies of much much higher
frequencies.) |
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I'm not sure of the effectiveness. Next time you put your head inside a turkey, try to listen to what's going on around you. You'll find the external sound quite attenuated. |
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And yet, ipse quandam nul quontam, I can hear my stomach
gurgling quite easily. So how does that work? |
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I think were you to pull yourself inside out you'd find the sound both louder and with a much greater high frequency component. |
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I had a supplier who melted two components together for us with ultrasonics.WOW, WAS THAT EVER FREAKING LOUD AND ANNOYING TO VISIT THAT PLANT ! |
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// Next time you put your head inside a turkey // |
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So you don't like the idea because you think it won't
work? That's not a reason to bone a halfbaked idea. |
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