http://dmoz.org/Science/Technology/Acoustics,_Ultrasound_and_Vibration/ Top: Science: Technology: Acoustics, Ultrasound and Vibration (770)
--------- Forwarded message ----------
From: Esa Ruoho <esaruoho @ g m a i l .com>
Date: 22-Mar-2007 14:14
Subject: sonofusion according to wikipedia (jumble of pages slapped together)
To: [email protected]
wikipedia likes to call sonofusion "bubble fusion" too (see end of message)
acoustic cavitation they want to call sonic cavitation.
so according to this
Sonofusion is a common name for nuclear fusion, occurring during sonoluminescence, which is an extreme form of acoustic cavitation. acoustic cavitation occurs when ultrasound-waves are passed through a liquid, which causes the formation of bubbles, which is known as cavitation.
because a sound-wave periodically compresses/decompresses (NOTE! inhale-exhale) a liquid, cavitation can be produced in the low-pressure part of the cycle, when the sound intensity is enough.
WikiPedia when talking about cavitation, mentions impellers, but does in no way explain whether there is a connection between the rotational frequency of the impeller, the shape of it, and cavitation occurring. however, it has been suggested in books by Callum Coats, that cavitation is a intense reaction caused in pressure-based propellers or impellers, and this is because of the poor movement of this shape. that this causes the impellers+propellers damage!
wikipedia also speaks of non-inertial cavitation, where a bubble in a fluid is forced to _oscillate_ in size/shape due to an acoustic field. this is used in ultrasonic cleaning of baths.
Sonoluminescence: "the emission of short bursts of light from imploding bubbles in a liquid when excited by sound."
Dale Pond equates "Implosion" "Water-hammer effect" and "Cavitation" as being the same thing, which keely and schauberger and were working towards.
He speaks of it in these two videos: