djewesbury wrote:I would have thought that the expansion of the glass (are we talking microns here?) would be even in each direction - meaning that the space inside the bottle would actually contract...
The external size would increase by more than the internal size, but both would increase.
Figure 2 of this essay entitled Thermal expansion measurement of glasses suggests, at relevant temperatures, expansion of less than 10 parts per million per degree C. So heating by 50°C would expand the glass by less than 500 ppm. For a 20mm hole that’s an expansion of less than ≈ 0.01mm. Surely too small to matter.
djewesbury wrote:I would have thought that the expansion of the glass (are we talking microns here?) would be even in each direction - meaning that the space inside the bottle would actually contract...
The external size would increase by more than the internal size, but both would increase.
Figure 2 of this essay entitled Thermal expansion measurement of glasses suggests, at relevant temperatures, expansion of less than 10 parts per million per degree C. So heating by 50°C would expand the glass by less than 500 ppm. For a 20mm hole that’s an expansion of less than ≈ 0.01mm. Surely too small to matter.
Fascinating. So.. who did we conclude was right / was wrong / could remember the question?
You just don't get this level of debate on wine-pages.com.
Daniel J.
Husband of a relentless former Soviet Chess Master.
delete.. delete.. *sigh*.. delete...
I bought a 750ml and 3 375mls. We are drinking D80 tonight, and then away for the weekend (drinking a D63 in Edinburgh, in the building in which it was bottled). So it'll be next week before I get the chance to do this, bit at the earliest opportunity I will open the 750 and one of the 375s, and of course post a TN here.
I like (as in, don't like) the fact that Roy makes you justify your TNs. 'What do you mean, rich heat? Explain yourself!'
Daniel J.
Husband of a relentless former Soviet Chess Master.
delete.. delete.. *sigh*.. delete...