Phase amplification in spinodal decomposition of immiscible fluids with interconversion of species
Phase amplification in spinodal decomposition of immiscible fluids with interconversion of species
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DOI：
10.1103/physreve.103.l060101
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发表时间：
2021-06-17
影响因子：
2.4
通讯作者：
Anisimov, Mikhail A.
中科院分区：
文献类型：
--
作者：
Shumovskyi, Nikolay A.;Longo, Thomas J.;Anisimov, Mikhail A.
由两个分子物种组成的流体可以通过调幅节点分解进行相分离。然而，如果这两个分子物种能够相互转换，例如改变它们的手性，那么就会出现一种到目前为止还没有被研究过的相位放大现象。因此，最终，一个阶段将完全消除另一个阶段。我们在伊辛系统上模拟了这一现象，该系统通过川崎扩散和Glauber相互转换的混合动力学弛豫到平衡。通过引入Glauber相互转换动力学的几率，我们证明了粒子守恒定律被打破，从而导致了位相放大。我们通过基于Glauber动力学概率、系统大小和到分离的临界温度的距离的标度律来表征位相放大的速度。
A fluid composed of two molecular species may undergo phase segregation via spinodal decomposition. However, if the two molecular species can interconvert, e.g., change their chirality, then a phenomenon of phase amplification, which has not been studied so far to our best knowledge, emerges. As a result, eventually, one phase will completely eliminate the other one. We model this phenomenon on an Ising system which relaxes to equilibrium through a hybrid of Kawasaki-diffusion and Glauber-interconversion dynamics. By introducing a probability of Glauber-interconversion dynamics, we show that the particle conservation law is broken, thus resulting in phase amplification. We characterize the speed of phase amplification through scaling laws based on the probability of Glauber dynamics, system size, and distance to the critical temperature of demixing.