论文标题
三元流体混合物的自发相分离
Spontaneous Phase Separation of Ternary Fluid Mixtures
论文作者
论文摘要
我们在计算上使用晶格玻尔兹曼方法计算三元流体混合物的自发相分离，这两者都在所有表面张力相等时，并且当它们具有不同的值时。以前的理论工作通常依赖于简单的线性稳定性分析产生的特征值的迹象，但我们发现这并不能解释观察到的流体形态。在这里，通过在不稳定模式的特征值和特征向量的整个组成空间和理论分析上结合系统的计算机模拟，我们确定了四个基本相位分离途径。特别是，我们强调了一种占主导地位但被忽视的机制，涉及流体流体界面处的次要成分的富集和不稳定性
We computationally study the spontaneous phase separation of ternary fluid mixtures using the lattice Boltzmann method, both when all the surface tensions are equal and when they have different values. Previous theoretical works typically rely on analysing the sign of the eigenvalues resulting from a simple linear stability analysis, but we find this does not explain the fluid morphologies observed. Here, by combining systematic computer simulations over the full range of the composition space and theoretical analysis on the eigenvalues and eigenvectors of the unstable modes, we identify four fundamental phase separation pathways. In particular, we highlight a dominant but so-far overlooked mechanism involving enrichment and instability of the minor component at the fluid-fluid interface
