 Physical principles of decompression sickness
morning all (well just)
I have been doing some reading (got to be careful here) about decompression sickness being described by pouring a pint of worthies or tetleys. I enquired with our resident HSE dive team on campus and my thesis tutor dug out an old exam paper from 4 years ago. One of the questions being "Opening and pouring a tin of beer into a glass reveals many physical properties of decompression sickness. Describe them" - 8 marks
Needless to say this got my brain (sometimes called brian) ticking over and started reading into it. I can understand that the imperfections in the glass surface create cavities for nucleation of micro bubbles - hence bubbles appear in the beer.
Other than that im a bit in the dark here - any ideas?
Cheers
Keith
P.S. the other half of the question was "Draw a typical M-Value graph for a dive, indicating how a diver would use the graph to minimise his decompression time" - 12 marks |