Mind, there's a good chance what you've seen was actually produced by a
"fog machine" atomizing some sort of glycerin or oil. Widely used for
stage fog, and the result does persist as you've described.
https://en.wikipedia.org/wiki/Fog_machine
I've never liked those, mind - inhaling the results is allegedly
harmless, but I've always had my doubts.
On 8/22/2015 8:49 AM, John Dom wrote:
I am not familiar with ocean fog unfortunately.
The smoke transparency of the surfacing CO2 bubbles type may differ. It is not
looking like steam or a fine water spray but like a white powder_which settles
for a remarkable long time on the stage. Mysterious to me.
Oh yes, R&R bands using this stuff also dates me probably...
jd
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
Behalf Of Henry Vanderbilt
Sent: zaterdag 22 augustus 2015 15:08
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: scuba or astronaut gas temperature question
On 8/22/2015 3:01 AM, John Dom wrote:
Related: throwing chunks of solid carbon dioxide in water makes it
bubble with sublimated cold CO2 vapor. But why does that gas produce a
**lingering** fog on rock&roll stages?
Been a while since I had anything to do with a rock&roll stage, but I'd
speculate the dry-ice-in-water fog lingers for the same reason ocean fog
does: It's a water-saturated air mass that's been cooled below its dew point,
so small-enough-to-stay-suspended water droplets precipitate.
The droplets can't evaporate again until the air mass they're in has warmed up.
(Even then, the evaporation must take some finite time.)