Phase-Field Model-Based Simulation of Motions of a Two-Phase Fluid on Solid Surface
Phase-Field Model-Based Simulation of Motions of a Two-Phase Fluid on Solid Surface
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DOI：
10.1299/jcst.7.322
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
N. Takada;J. Matsumoto;S. Matsumoto
中科院分区：
文献类型：
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作者：
N. Takada;J. Matsumoto;S. Matsumoto
采用基于相场模型(PFM)的界面跟踪方法对固体表面微观两相流体运动进行了初步的数值模拟。提出了两种基于虚拟粒子运动学的格子Boltzmann方法(LBM)，用于求解扩散界面平流方程，并对其进行了修正，以改进PFM模拟中的流体体积守恒。主要研究结果如下：(1)界面跟踪法准确地预测了平行平板密度比较高的动态两相流体系统中的毛细管力效应；(2)LBMS的使用使两相流体的初始形状和体积在线性平移中得到了充分的保留。这些结果表明，基于PFM的方法和基于LBM的对流格式可以用于模拟器件、机械和高通量微器件制造过程中各种宏微流体问题中的两相流体运动。
A preliminary numerical simulation of the microscopic two-phase fluid motion on a solid surface was conducted using an interface-tracking method based on the phase-field model (PFM). Two variations of the lattice Boltzmann method (LBM) based on fictitious particle kinematics are proposed for solving diffuse-interface advection equations which were revised to improve volume-of-fluid conservation in the PFM simulations. The major findings are as follows: (1) the interface-tracking method accurately predicted the capillary force effect on dynamic two-phase fluid systems with a high density ratio between parallel plates; (2) the initial shape and volume of the two-phase fluid were retained adequately in linear translation with the use of the LBMs. These results proved that the PFM-based method and the LBM-based advection schemes can be used for simulating two-phase fluid motions in various macroand microfluidics problems for devices, machineries and higher-throughput microdevice fabrication processes.