Mesoscopic interparticle potentials in the lattice Boltzmann equation for multiphase fluids.
Mesoscopic interparticle potentials in the lattice Boltzmann equation for multiphase fluids.
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DOI：
10.1103/physreve.73.066703
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发表时间：
2006-06
期刊：
影响因子：
--
通讯作者：
R. Qin
中科院分区：
文献类型：
--
作者：
R. Qin
介绍了一种由宏观热力学推导介观粒子相互作用的方法，该方法适用于用格子玻尔兹曼方程模拟多相流体。对于货车德瓦耳斯流体，相互作用具有一个高密度的强排斥核和一个低密度的弱吸引尾，类似于用质量密度代替粒子间距离的Lennard-Jones势.相分离的数值结果表明，液滴生长计划，而不是spinodal分解，并准确地展示平衡相图，令人信服的界面能属性，和不可逆热力学。
I introduce a method to derive mesoscopic particle interactions by macroscopic thermodynamics, which is suitable for simulation of multiphase fluids by means of the lattice Boltzmann equation. For van der Waals fluids, the interaction possesses a high-density strong repulsive core and a low-density weak attractive tail, which looks like the Lennard-Jones potential with replacement of the distance between particles with mass density. Numerical results on phase separation show a droplet growth scheme rather than spinodal decomposition, and exhibit accurately the equilibrium phase diagram, a convincing interfacial energy property, and irreversible thermodynamics.