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arXiv 1306.3491cond-mat.soft
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当被限制在波动壁和固定壁之间时核软化流体的不同动力学和结构特性

Distinct dynamical and structural properties of a core-softened fluid when confined between fluctuating and fixed walls

Leandro Batirolla Krott, José Rafael Bordin

摘要:

我们研究了流动性的约束介质的结构和动力学性质的核心软化流体约束下的影响。流体建模使用一个两个长度尺度的潜力,在批量再现在水中观察到的异常行为。我们进行模拟的$NVT$合奏与固定的平壁和$NpT$合奏使用波动壁控制的压力,研究流体的行为是如何受到固定和非固定的墙壁。我们的研究结果表明,流体动力学和结构特性的强烈影响壁的流动性。在两个长度尺度势的框架下解释了所观察到的不同行为。

英文摘要:

We study the influence of mobility of the confining media in the structural and dynamical properties of a core-softened fluid under confinement. The fluid is modeled using a two-length scale potential, which reproduces in bulk the anomalous behavior observed in water. We perform simulations in the $NVT$ ensemble with fixed flat walls and in the $NpT$ ensemble using a fluctuating wall control of pressure to study how the fluid behavior is affected by fixed and non-fixed walls. Our results indicate that the fluid dynamical and structural properties are strongly affected by the wall mobility. The distinct observed behavior are explained in the framework of the two length scale potential.

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