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Sinking bubbles in stout beers

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Show simple item record Lee, William T. Kaar, Simon O'Brien, Stephen B.G. 2018-10-03T14:10:49Z 2018-10-03T14:10:49Z 2018
dc.description peer-reviewed en_US
dc.description.abstract A surprising phenomenon witnessed by many is the sinking bubbles seen in a settling pint of stout beer. Bubbles are less dense than the surrounding fluid so how does this happen? Previous work has shown that the explanation lies in a circulation of fluid promoted by the tilted sides of the glass. However, this work has relied heavily on computational fluid dynamics (CFD) simulations. Here, we show that the phenomenon of sinking bubbles can be predicted using a simple analytic model. To make the model analytically tractable, we work in the limit of small bubbles and consider a simplified geometry. The model confirms both the existence of sinking bubbles and the previously proposed mechanism. en_US
dc.language.iso eng en_US
dc.publisher American Assocation of Physics Teachers en_US
dc.relation.ispartofseries American Journal of Physics;86 (4)
dc.rights Copyright 2018 American Association of Physics Teachers. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Association of Physics Teachers en_US
dc.subject sinking bubbles en_US
dc.subject stout beer en_US
dc.title Sinking bubbles in stout beers en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1119/1.5021361
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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