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- Newsgroups: sci.physics.fusion
- Path: sparky!uunet!coplex!chuck
- From: chuck@coplex.com (Chuck Sites)
- Subject: Re: Sonoluminescence - certain knowledge?
- Organization: Copper Electronics, Inc.
- Date: Thu, 7 Jan 1993 07:32:02 GMT
- Message-ID: <1993Jan7.073202.22731@coplex.com>
- References: <00966330.AB98DB60.10309@dancer.nscl.msu.edu> <1993Jan6.191134.19959@murdoch.acc.Virginia.EDU>
- Lines: 53
-
- crb7q@kelvin.seas.Virginia.EDU (Cameron Randale Bass) writes:
-
- >In article <00966330.AB98DB60.10309@dancer.nscl.msu.edu> blue@nscl01.nscl.msu.edu writes:
- >>Could someone set my mind at ease by making a clear statement as to
- >>what is know about sonoluminescence, ultracavitation, and related
- >>topics as opposed to conjecture based on doubtful interpretations of
- >>a very limited data set?
-
- > The dataset is not as limited as it sounds, and the recent results
- > are a) consistent with earlier results, b) plausable on theoretical
- > grounds, and c) apparently well done.
-
- >>My understanding of cavitation and bubble formation is that it can
- >>involve a very small move away from equilibrium conditions. All that
- >>is required is that the local pressure in the liquid fall below the
- >>vapour pressure. I would assume that the bubble fills with vapour
- >>on a time scale close to that required for collapse so I don't
- >>understand why there is any talk about collapse into a "void".
-
- > Yes. Void is used by fluid dynamicists to talk about a
- > space filled with vapour. We shouldn't be talking about a vacuum.
-
- Some food for thought. What we seem to be discussing is how the
- energy of cavitation can lead to fusion. IMHO, it's an excellent
- question, so let me give you my simple thought model of how it works.
- Get a balloon, and put some dots on it. The dots represent molecules
- of the liquid at the void/liquid interface. As you blow the balloon
- up (representing the expansion of the void), add more dots to maintain
- an equal spacing of dots. As you draw lines between the dots (representing
- bonding) you can see this should collect a large number of electrons at the
- surface interface (many weakly bonded). The vapor molecules are self-
- contained. The collapse of the balloon, must then either push the additional
- dots back to it source, or be pushed into the void area. Either way a
- significant number of bonds are broken at the surface, and that suggests
- the emission of quanta.
-
- Still the the release of electrons during the void collapse should
- concentrate at the center of the void. If we assume the void is a fusible
- vapor, two actions occur. Kinetic energy is transferred from the
- collapsing surface to the center by EM forces of the lattice, and
- free electron densities increase at the center. It follows from
- the work of S. Koonin, that these combinations are optimal enhanced
- fusion rates.
-
- Have fun,
- Chuck Sites
- chuck@coplex.com
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