Waves in Guinness

Waves in Guinness
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吉尼斯世界纪录中的波浪

DOI:
10.1063/1.2929369
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发表时间:
2008
期刊:
影响因子:
4.6
通讯作者:
S. O'Brien
S. O'Brien
中科院分区:
工程技术2区
文献类型:
--
作者:
M. Robinson;A. Fowler;A. Alexander;S. O'Brien

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我们描述了一个简单的气泡两相流模型,该模型能够解释为什么当倒入一品脱健力士啤酒时,波浪向下传播,以及波浪是如何产生的。我们的理论涉及基于物理的两相流基本方程的正则化,使用相间压差和虚质量项,以及体积或涡流粘度项。我们表明,波可以通过类似于在倾斜流体流动中形成横摇波的不稳定性而发生,我们提供了这些波的形式的描述,并将它们与观测结果进行比较。我们的理论为描述更一般的气泡两相流中的波,以及流分解形成段塞流的方式提供了一个平台。
We describe a simple model of a bubbly two-phase flow which is able to explain why waves propagate downward when a pint of Guinness is poured, and also how the waves are generated. Our theory involves a physically based regularization of the basic equations of the two-phase flow, using interphasic pressure difference and virtual mass terms, together with bulk or eddy viscosity terms. We show that waves can occur through an instability analogous to that which forms roll waves in inclined fluid flows, and we provide a description of the form of these waves, and compare them to observations. Our theory provides a platform for the description of waves in more general bubbly two-phase flows, and the way in which the flow breaks down to form slug flow.
DOI: --
发表时间: 1969-08
期刊: --
影响因子: --
作者:
G. Wallis
通讯作者: G. Wallis