Single bubble rising dynamics for moderate Reynolds number using Lattice Boltzmann Method
Single bubble rising dynamics for moderate Reynolds number using Lattice Boltzmann Method
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DOI：
10.1016/j.compfluid.2010.03.003
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发表时间：
2010-08-01
影响因子：
2.8
通讯作者：
Lee, Taehun
中科院分区：
文献类型：
--
作者：
Amaya-Bower, Luz;Lee, Taehun
采用基于Cahn-Hilliard扩散界面方法的格子Boltzmann方法研究了单个上升气泡的动力学行为。气泡由于重力而上升。然而，气泡的变形和速度取决于由表面张力、惯性和粘度产生的其他力的平衡。根据作用在系统上的主要力，气泡动力学可以分为不同的区域。通过在以下范围内系统地改变莫顿数（Mo）和邦德数（Bo）的值，计算地实现这些状态（1 × 10（-5）≤ Mo ≤ 3 × 10（4））和（1 < Bo < 1 × 10（3））终端形状和雷诺数（Re）是相互作用的量，取决于气泡的大小，表面张力，粘度，和周围流体的密度精确模拟每个区域的终端形状和Re可以令人满意地预测和模拟，因为它们也是Mo和Bo的函数结果与以前的实验结果进行了比较（C）2010 Elsevier Ltd.版权所有
Dynamics of a single rising gas bubble is studied using a Lattice Boltzmann Method (LBM) based on the Cahn-Hilliard diffuse interface approach. The bubble rises due to gravitational force. However, deformation and velocity of the bubble depend on the balance of other forces produced by surface tension, inertia, and viscosity. Depending on the primary forces acting on the system, bubble dynamics can be classified into different regimes. These regimes are achieved computationally by systematically changing the values of Morton number (Mo) and Bond number (Bo) within the following ranges (1 x 10(-5) < Mo < 3 x 10(4)) and (1 < Bo < 1 x 10(3)) Terminal shape and Reynolds number (Re) are interactive quantities that depend on size of bubble, surface tension, viscosity, and density of surrounding fluid Accurate simulation of terminal shape and Re for each regime could be satisfactorily predicted and simulated, since they are also functions of Mo and Bo Results are compared with previous experimental results (C) 2010 Elsevier Ltd. All rights reserved