Numerical Investigation of Roll Wave in Guinness Beer
Numerical Investigation of Roll Wave in Guinness Beer
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DOI：
10.3811/jjmf.2020.021
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发表时间：
2020-03
期刊：
影响因子：
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通讯作者：
Ryoei Yoshioka;T. Watamura;K. Sugiyama
中科院分区：
文献类型：
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作者：
Ryoei Yoshioka;T. Watamura;K. Sugiyama
为了深入了解吉尼斯啤酒中气泡纹理形成的机理，采用欧拉-拉格朗日方法结合离散元法对倾斜容器内的非定常流动进行了数值模拟。织构的形成可以通过准二维模拟再现。随着初始颗粒体积分数的增加和容器倾角的减小，速度脉动增强。安排使用弗劳德数Fr和浓度界面H的逆分辨率，速度波动幅度的数值结果加强实验推断的论点，即纹理的形成是由纯流体层中的滚波不稳定性引起的，这假定了分散相的流体行为。
To gain insight into the mechanism of texture formation of bubbles in a glass of Guinness beer, a numerical simulation of an unsteady flow in an inclined vessel is performed using Eulerian-Lagrangian approach with discrete element method. The texture formation can be reproduced by quasi-two-dimensional simulation. The velocity fluctuation is enhanced with increasing the initial particle volume fraction and with decreasing container inclination angle. Arranged using the Froude number Fr and the inverse resolution of concentration interface H, the numerical results of the velocity fluctuation magnitude strengthen the experimentally inferred argument that the texture formation is caused by a roll wave instability in the pure fluid layer, which postulates fluid-like behavior of the dispersed phase.