On 9/7/2017 5:11 PM, Danny D. wrote:
Anyone know if saturation by carbon dioxide has a time constant?
http://i.imgur.com/MSm72Tp.jpg

Swirling seems to work with these 2L bottles, where I mix 4 degrees C
(or about) water under 30 psi CO2 pressure (or about) for about 10
minutes per bottle (give or take) because I assume "diffusion" is slow;
but is diffusion slow, or is it (nearly) instantaneous?
http://i.imgur.com/gUJnLk3.jpg

Anyone have experience with how long it should take for carbon dioxide
to diffuse into the surface layer of water, and then to diffuse deeper
if I don't swirl?

If I just plug it in for a few minutes, the water isn't bubbly enough.

If I leave it for an hour, two things that are bad happen:
1. I lose CO2 because my connections are imperfect, but worse, 2. The
water warms up (meaning it will hold less C02).

If you don't know whether the diffusion "should" be instantaneous or if
there is some kind of pragmatic coefficient, that's OK. It works.
I just don't know what I'm doing and why.
Do you?

I have read that that using a micro aerator introducing the CO2 in very
small bubbles at the bottom of the receiving container will increwase
the rate of diffusion into the water. Shaking or splashing the water to
increase CO2/H2O contact also helps. With my corny kegs, I can hear the
gas flow in when I shake the top of the keg back and forth. Stop
shaking, and the gas flow quickly tapers down to very slow.