تقرير
Early-time wetting kinetics in surface-directed spinodal decomposition for off-critical quenches: A molecular dynamics study
| العنوان: | Early-time wetting kinetics in surface-directed spinodal decomposition for off-critical quenches: A molecular dynamics study |
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| المؤلفون: | Zaidi, Syed Shuja Hasan, Suvarna, Saumya, Priya, Madhu, Puri, Sanjay, Jaiswal, Prabhat K. |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Soft Condensed Matter, Condensed Matter - Statistical Mechanics |
| الوصف: | We present results from the molecular dynamics (MD) simulation of surface-directed spinodal decomposition (SDSD) in binary fluid mixtures ($A+B$) with off-critical compositions. The aim is to elucidate the role of composition ratio in the early-time wetting kinetics under the influence of long-range surface potential. In our simulations, the attractive part of surface potential varies as $V(z)= -\epsilon_a/z^{n}$, with $\epsilon_{a}$ being the surface-potential strength. The surface prefers `$A$' species to form the wetting layer. Its thickness [$R_1(t)$] for the majority wetting (number of $A$-type particles [$N_A$] > number of $B$-type particles [$N_B$]), grows as a power-law with an exponent $1/(n+2)$. This is consistent with the early-time kinetics in the form of potential-dependent growth present in the Puri-Binder model. However, for minority wetting ($N_A$ < $N_B$), the growth exponent in $R_1(t)$ is less than $1/(n+2)$. Furthermore, on decreasing the field strength $\epsilon_{a}$, we recover $1/(n+2)$ for a minority wetting case. We provide phenomenological arguments to explain the early-time wetting kinetics for both cases. Comment: 11 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2408.08800 |
| رقم الأكسشن: | edsarx.2408.08800 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |