标题： 粘性生长定律在气泡粗化中的应用：分子动力学视角 显示英文标题

标题： Viscous Growth Law in Bubble Coarsening: A Molecular Dynamics Perspective

摘要： 我们使用大规模分子动力学模拟研究单组分Lennard-Jones流体中气泡粗化的动力学。一个均匀的高温系统被淬火至临界温度以下，以在致密液体基质中引发蒸汽气泡的成核和生长。结构演化通过两个点相关函数和静态结构因子进行表征，两者均表现出与Porod定律一致的动态缩放和清晰的界面。从相关函数中提取的时间依赖特征长度尺度显示出稳健的幂律增长$\ell(t) \sim t^{\alpha}$。跨不同系统尺寸的有限尺寸标度分析得到$\alpha \approx 1.0$，确立了粗化主要由粘性水动力相互作用主导，而非由Lifshitz-Slyozov-Wagner理论预测的经典扩散限制Ostwald熟化。这些结果为气液系统中由流体流动控制的粗化提供了原子级证据，并强调了需要超越基于扩散的理论来描述致密流体中的气泡动力学。 显示英文摘要

摘要： We investigate the kinetics of bubble coarsening in a single component Lennard-Jones fluid using large-scale molecular dynamics simulations. A homogeneous high-temperature system is quenched below the critical temperature to induce the nucleation and growth of vapor bubbles within a dense liquid matrix. The structural evolution is characterized by two point correlation functions and the static structure factor, both of which exhibit dynamic scaling and sharp interfaces consistent with Porod law. The time-dependent characteristic length scale, extracted from the correlation function, shows a robust power law growth $\ell(t) \sim t^{\alpha}$. Finite size scaling analysis across different system sizes yields $\alpha \approx 1.0$, establishing that coarsening is dominated by viscous hydrodynamic interactions rather than classical diffusion-limited Ostwald ripening predicted by the Lifshitz-Slyozov-Wagner theory. These results provide atomistic evidence for fluid flow controlled coarsening in vapor-liquid systems and emphasize the need to go beyond diffusion-based theories to describe bubble dynamics in dense fluids.