[math-fun] minimalist beer froth
I’d be interested if anyone can reproduce the following effect I observed earlier this evening when dispensing a bottle of Sam Adams Boston Lager. The key, I believe, is to empty the bottle into the glass as quickly as possible by upending the bottle above the glass. Use a large glass and don’t be distracted by the large amount of foam that is generated in the glass. Focus instead on the geometry of the minimal (beer film) surfaces left behind in the bottle. To my astonishment, there were eight flat films roughly evenly spaced along the length of the bottle! -Veit
This sounds like a particularly worthy subject for scientific investigation, but it's going to require a trip to the supermarket. I'll report back later. On Wed, Nov 18, 2015 at 6:48 PM, Veit Elser <ve10@cornell.edu> wrote:
I’d be interested if anyone can reproduce the following effect I observed earlier this evening when dispensing a bottle of Sam Adams Boston Lager.
The key, I believe, is to empty the bottle into the glass as quickly as possible by upending the bottle above the glass. Use a large glass and don’t be distracted by the large amount of foam that is generated in the glass. Focus instead on the geometry of the minimal (beer film) surfaces left behind in the bottle. To my astonishment, there were eight flat films roughly evenly spaced along the length of the bottle!
-Veit _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
-- Thane Plambeck tplambeck@gmail.com http://counterwave.com/
The beverage being unobtainable in this part of the world, I am obliged to rely on a thought experiment. [Which may have the advantage of leaving a clearer head with which to report the results.] As the liquid leaves the bottle, it is replaced by incoming air, which enters at regular intervals determined by the diameter of the neck: glug, glug, glug. Once inside, each glug forms a bubble of relatively large constant size. Rising clear of the liquid, the area of the bubble surface is eventually minimised by the action of surface tension: thish minimum ish easily sheen to comprishe planar (via shymmetry) shircular dishcs adhering to the wallsh ... [Uuurp!] WFL On 11/19/15, Thane Plambeck <tplambeck@gmail.com> wrote:
This sounds like a particularly worthy subject for scientific investigation, but it's going to require a trip to the supermarket. I'll report back later.
On Wed, Nov 18, 2015 at 6:48 PM, Veit Elser <ve10@cornell.edu> wrote:
I’d be interested if anyone can reproduce the following effect I observed earlier this evening when dispensing a bottle of Sam Adams Boston Lager.
The key, I believe, is to empty the bottle into the glass as quickly as possible by upending the bottle above the glass. Use a large glass and don’t be distracted by the large amount of foam that is generated in the glass. Focus instead on the geometry of the minimal (beer film) surfaces left behind in the bottle. To my astonishment, there were eight flat films roughly evenly spaced along the length of the bottle!
-Veit _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
-- Thane Plambeck tplambeck@gmail.com http://counterwave.com/ _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
On Nov 19, 2015, at 9:14 AM, Fred Lunnon <fred.lunnon@gmail.com> wrote:
The beverage being unobtainable in this part of the world, I am obliged to rely on a thought experiment. [Which may have the advantage of leaving a clearer head with which to report the results.]
As the liquid leaves the bottle, it is replaced by incoming air, which enters at regular intervals determined by the diameter of the neck: glug, glug, glug. Once inside, each glug forms a bubble of relatively large constant size. Rising clear of the liquid, the area of the bubble surface is eventually minimised by the action of surface tension: thish minimum ish easily sheen to comprishe planar (via shymmetry) shircular dishcs adhering to the wallsh ...
[Uuurp!] WFL
While this, so far, is the best theoretical proposal I’ve seen, I was counting on researchers in your part of the world to add perspective on the temperature dependence, in particular, the infinite T limit. -Veit
<< I was counting on researchers in your part of the world to add perspective on the temperature dependence, in particular, the infinite T limit. >> I did try --- but it was too cold, I couldn't wait that long, and any way my specs were steaming up. WFL On 11/19/15, Veit Elser <ve10@cornell.edu> wrote:
On Nov 19, 2015, at 9:14 AM, Fred Lunnon <fred.lunnon@gmail.com> wrote:
The beverage being unobtainable in this part of the world, I am obliged to rely on a thought experiment. [Which may have the advantage of leaving a clearer head with which to report the results.]
As the liquid leaves the bottle, it is replaced by incoming air, which enters at regular intervals determined by the diameter of the neck: glug, glug, glug. Once inside, each glug forms a bubble of relatively large constant size. Rising clear of the liquid, the area of the bubble surface is eventually minimised by the action of surface tension: thish minimum ish easily sheen to comprishe planar (via shymmetry) shircular dishcs adhering to the wallsh ...
[Uuurp!] WFL
While this, so far, is the best theoretical proposal I’ve seen, I was counting on researchers in your part of the world to add perspective on the temperature dependence, in particular, the infinite T limit.
-Veit _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
Don't forget to save your receipt. It's professional expenses. :-) Jim On Thu, Nov 19, 2015 at 2:32 AM, Thane Plambeck <tplambeck@gmail.com> wrote:
This sounds like a particularly worthy subject for scientific investigation, but it's going to require a trip to the supermarket. I'll report back later.
On Wed, Nov 18, 2015 at 6:48 PM, Veit Elser <ve10@cornell.edu> wrote:
I’d be interested if anyone can reproduce the following effect I observed earlier this evening when dispensing a bottle of Sam Adams Boston Lager.
The key, I believe, is to empty the bottle into the glass as quickly as possible by upending the bottle above the glass. Use a large glass and don’t be distracted by the large amount of foam that is generated in the glass. Focus instead on the geometry of the minimal (beer film) surfaces left behind in the bottle. To my astonishment, there were eight flat films roughly evenly spaced along the length of the bottle!
-Veit _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
-- Thane Plambeck tplambeck@gmail.com http://counterwave.com/ _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
participants (4)
-
Fred Lunnon -
James Propp -
Thane Plambeck -
Veit Elser