Wide-ranging survey on the laminar flow of individual Taylor bubbles rising through stagnant Newtonian liquids
Wide-ranging survey on the laminar flow of individual Taylor bubbles rising through stagnant Newtonian liquids
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DOI：
10.1016/j.ijmultiphaseflow.2012.03.007
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发表时间：
2012-07-01
影响因子：
3.8
通讯作者：
Campos, J. B. L. M.
中科院分区：
文献类型：
--
作者：
Araujo, J. D. P.;Miranda, J. M.;Campos, J. B. L. M.
本文对层流状态下单个Taylor气泡通过静止牛顿液体垂直柱的上升过程进行了广泛的数值研究。所应用的计算流体力学程序是基于商业软件包Ansys FLUENT的流体体积（VOF）方法。所进行的模拟涵盖了宽范围的柱直径和粘度，对应于Morton数和Eotvos数，分别在4.72 x 10（-5）至104和6-900的区间内。几个相关的流体动力学特性的三个主要的流动区域（头部区域，液体膜和尾流区域）被确定。在某些情况下，这些功能相比，有利的预测可用的相关性和理论方程。由于缺乏关于尾流结构的公开资料，因此对该流动区域特别感兴趣，其中提出了一些通用方程来估计相关的水动力特征。本研究为进一步研究弹状流系统提供了有益的工具。(C)2012爱思唯尔有限公司保留所有权利。
A wide-ranging numerical survey of the rising of individual Taylor bubbles through vertical columns of stagnant Newtonian liquid in laminar flow regime is presented in the present paper. The CFD procedure applied is based in the volume of fluid (VOF) methodology of the commercial package Ansys FLUENT. The simulations performed covered wide ranges of column diameters and viscosities, corresponding to Morton and Eotvos numbers within the intervals of 4.72 x 10(-5) to 104 and 6-900, respectively. Several relevant hydrodynamic features regarding the three main flow regions considered (nose region, liquid film and wake region) were determined. In some cases, these features were favourably compared to predictions of available correlations and theoretical equations. Due to the lack of published material about the wake structure, a particular interest was taken on this flow region, where some general equations are presented to estimate the related hydrodynamic features. This study can become a useful tool for future studies on slug flow systems. (C) 2012 Elsevier Ltd. All rights reserved.