二元流体混合物的流体动力学——一种增强的多粒子碰撞动力学方法
Hydrodynamics of Binary Fluid Mixtures - An Augmented Multiparticle Collison Dynamics Approach
AI总结：
本文通过将多粒子碰撞动力学（MPC）与Ginzburg-Landau自由能泛函耦合并引入密度依赖项，提出一种增强的二元流体及多相流模拟方法，验证表明其能准确描述临界分离点热力学、液滴界面涨落及相分离动力学。
摘要：
多粒子碰撞动力学技术（MPC）用于流体动力学模拟，通过将基于粒子的流体动力学与相分离二元流体的Ginzburg-Landau自由能泛函耦合，被推广至二元流体混合物和多相流。为描述具有非理想状态方程的流体，引入了额外的密度依赖项。通过将该新方法应用于临界分离点附近的热力学以及液滴的界面涨落，对其进行了验证。从毛细波谱分析获得的界面张力与基于Laplace-Young方程的结果吻合良好。相分离动力学遵循Lifshitz-Slyozov定律。
英文摘要：
The Multiparticle Collision Dynamics technique (MPC) for hydrodynamics simulations is generalized to binary fluid mixtures and multiphase flows, by coupling the particle-based fluid dynamics to a Ginzburg-Landau free-energy functional for phase-separating binary fluids. To describe fluids with a non-ideal equation of state, an additional density-dependent term is introduced. The new approach is verified by applying it to thermodynamics near the critical demixing point, and interface fluctuations of droplets. The interfacial tension obtained from the analysis of the capillary wave spectrum agrees well with the results based on the Laplace-Young equation. Phase-separation dynamics follows the Lifshitz-Slyozov law.
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