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From: "Robertson, Iain" <ROBERTSONI@ol*.ag*.bt*.co*.uk*>
To: "'in-techdiver.msg'" <techdiver@terra.net>
Subject: RE: Tribonucleation the effect on a diver
Date: Mon, 25 Sep 95 13:16:00 GMT




> What is tribonucleation and what effect does it have  in the formation of
> DCS in a diver.

According to Bennett & Elliott, pg 384 (4th edition) :

When two sufaces in a liquid are pulled apart, viscosity prevents the liquid 

flowing into the gap thus created. The local absolute pressure decreases
due to viscous adhesion. So, in the newly created gap, the bits of tissue
at the gap may become supersaturated, with the nasty consequences
implied.

The cavitation which may result  was called tribonucleation by Haywood in
1967, in a paper  in the British Journal of Applied Physics, called
 'Tribonucleation of Bubbles'


          iain

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