Structure factor of a phase separating binary mixture with natural and forceful interconversion of species
Structure factor of a phase separating binary mixture with natural and forceful interconversion of species
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具有自然和强力物质相互转化的相分离二元混合物的结构因子
DOI：
10.1016/j.nocx.2022.100082
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发表时间：
2022
影响因子：
--
通讯作者：
Anisimov, Mikhail A.
中科院分区：
文献类型：
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作者：
Longo, Thomas J.;Shumovskyi, Nikolay A.;Asadov, Salim M.;Buldryev, Sergey V.;Anisimov, Mikhail A.
使用修改后的Cahn-Hilliard-Cook理论的spinodal分解在二元混合物中，表现出扩散和相互转换的动力学，我们推导出随时间变化的结构因子的浓度波动。我们比较的理论，并获得一个定性的协议与模拟的顺序参数和结构因子的时间演变的非平衡伊辛/晶格气体混合模型中存在的外部源的强相互转换。特别地，稳态相域的特征尺寸是从广义旋节分解理论中的放大因子的下限截止波数预测的。
Using a modified Cahn-Hilliard-Cook theory for spinodal decomposition in a binary mixture that exhibits both diffusion and interconversion dynamics, we derive the time-dependent structure factor for concentration fluctuations. We compare the theory and obtain a qualitative agreement with simulations of the temporal evolution of the order parameter and structure factor in a nonequilibrium Ising/lattice-gas hybrid model in the presence of an external source of forceful interconversion. In particular, the characteristic size of the steady-state phase domain is predicted from the lower cut-off wavenumber of the amplification factor in the generalized spinodal-decomposition theory.