Cavitation. The key to overunity?

[ramset]

Crazy Fox   So after reading your post it seems cavitation should not be taken lightly
Do you think the little shrimp in the ocean is also radiating?
Chet

[hansvonlieven]

G'day all,

For some information on sonoluminescence have a look at http://keelytech.com/sonoluminescence.html

Hope you find it interesting.

Hans von Lieven

[Pirate88179]

@ Hans:

Excellent article.  Thanks for posting it.  I wonder if anyone ever checked the mass of the bulb prior to running and after a long time of light emission, checked the mass of the bulb again.  If something is getting burned up it should be lighter, if something is occurring like fusion, the overall mass should still be the same no?  I am not sure.

Bill

[Pirate88179]

@ Haliburton:

Wow, that was a very detailed study on those shrimp.  Amazing little things.  I think your idea of a mechanical disk with holes to generate high speed pulses is very possible.  We once made a polished quartz "Chopper" wheel designed to break up a laser beam when it spun in its path for generating higher frequencies of light.  We made this for Bell Labs and, of course, they didn't tell us how or why they were using it.  If it works with light, why not water as you suggested?

One thing the video did not mention about the shrimp.  I find it difficult to believe that the piston on the claw and the pocket match with so much precision that this alone creates the implosion bubble.  After reading what Hans posted about how they have to introduce a small air bubble into the sealed bulb and manipulate it to the center before turning on the sound I got to thinking.  Nature always finds a way.  What if the shrimps "farts"  (for lack of a better term) a small amount of gas/air into the pocket to "charge" the claw just prior to slamming it closed?  I know the video did not mention this but this bubble could be almost microscopic and near undetectable but still be compressed to below the vapor pressure of the surrounding water causing the implosion.  Just a thought.  This would allow for a lot less precision fitting of the two parts of the claw and make more sense to me. I am just guessing, obviously, I am not a shrimp expert, although, they are good with a little cocktail sauce.

Bill

[hansvonlieven]

G'day Bill and all,

As far as I understand it cavitation is not an excess pressure (like a fart as you suggest) but quite the opposite. It is a small area of high vacuum that releases energy as the "bubble" collapses. in centrifugal pumps it is caused by water flowing so fast that a vacuum is created at the input side and these bits of vacuum are incorporated in the stream. That is why high pressure centrifugal pumps are staged to ensure that there is enough water pressure at the input to prevent the formation of a vacuum.

Hans von Lieven