Consistent simulation of droplet evaporation based on the phase-field multiphase lattice Boltzmann method
Consistent simulation of droplet evaporation based on the phase-field multiphase lattice Boltzmann method
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DOI：
10.1103/physreve.90.033305
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发表时间：
2014-09-10
影响因子：
2.4
通讯作者：
Krafczyk, Manfred
中科院分区：
文献类型：
--
作者：
Safari, Hesameddin;Rahimian, Mohammad Hassan;Krafczyk, Manfred
在本文中，我们扩展和推广了我们之前的文章[H]。M. H. Rahimian和M. Krafczyk，物理学家。Rev. E 88, 013304(2013)]将液-气界面处蒸汽浓度的梯度作为汽化的驱动力，从而允许从相界面蒸发在任意温度下工作。考虑到相位变化对速度场的影响，采用合适源项的点阵玻尔兹曼相场多相建模方法求解两相流场。采用修正的对流Cahn-Hilliard方程重构了界面拓扑结构的动力学。蒸汽浓度与界面温度场之间的耦合是用著名的克劳修斯-克拉珀龙相关来模拟的。进行了包括一维和二维案例在内的大量验证测试，以证明所提出模型的一致性。结果表明，该模型能够定量预测静止和对流环境下蒸发液滴周围和内部的流动特征。
In the present article, we extend and generalize our previous article [H. Safari, M. H. Rahimian, and M. Krafczyk, Phys. Rev. E 88, 013304 (2013)] to include the gradient of the vapor concentration at the liquid-vapor interface as the driving force for vaporization allowing the evaporation from the phase interface to work for arbitrary temperatures. The lattice Boltzmann phase-field multiphase modeling approach with a suitable source term, accounting for the effect of the phase change on the velocity field, is used to solve the two-phase flow field. The modified convective Cahn-Hilliard equation is employed to reconstruct the dynamics of the interface topology. The coupling between the vapor concentration and temperature field at the interface is modeled by the well-known Clausius-Clapeyron correlation. Numerous validation tests including one-dimensional and two-dimensional cases are carried out to demonstrate the consistency of the presented model. Results show that the model is able to predict the flow features around and inside an evaporating droplet quantitatively in quiescent as well as convective environments.