English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In order to find a measure of the dynamical features of phase separationkinetics during spinodal decomposition of a liquid binary mixture (like waterand cyclohexane , water and 2,6 lutidiene or methanol and cyclohexane), westudy both the initial fast exponential-like growth (the Cahn-Hilliard regime)and the subsequent cross-over to a much slower, non-exponential long timegrowth (the so-called scaling regime), by atomistic molecular dynamics (MD)simulation of a structure breaking binary liquid mixture. In particular, wecombine our MD simulations with a coarse grained multi scale modelling (CGMSM)capable of capturing both length and time scales of phase separation kineticswithin simulation box. The system is quenched from a higher temperature to twolower temperatures well below the coexistence temperature of the phase diagram.We observe a multiscale phase separation dynamics. Initially the growth isexponential up to a regime of 80-100ps having strong dependence over quenchdepth. Subsequently a cross-over regime appears where the dynamics slows downconsiderably due to coarsening through a power law phase. For deeper quenchpower law growth dominates over the initial exponential and the cross-overbecomes transient. We find that for the present parameter values for the binarymixture, the initial rapid growth of structure formation is practically overwithin 200 ps which is followed by slow structural coarsening. When scaled bythe respective viscosities, this time translates to 50-200 ns forwater-lutidine binary mixture. The last part of dynamics may extend into ms.The dynamics of phase separation is slowest in regions that have equitabledistribution of the two species, and one can observe the signatures of "up-hilldiffusion" that is a trade mark of spinodal decomposition.

Nanoscale heterogeneous phase separation kinetics in binary mixtures: Multistage dynamics