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arXiv 2103.12765cond-mat.stat-mech
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由热流驱动的连续非平衡相变

Continuous non-equilibrium transition driven by the heat flow

Yirui Zhang, Marek Litniewski, Karol Makuch, Pawel J. Zuk, Anna Maciolek, Robert Holyst

AI总结:

本文研究理想气体中由热流驱动的非平衡连续相变,发现临界热流下系统分为低密度热气体与高密度冷气体两侧,并提出稳态类亥姆霍兹函数描述内壁稳定位置。

摘要:

我们发现理想气体在两壁之间、被一个绝热可移动内壁分隔时会出现一种非平衡相变。系统通过直接向气体体积内供给能量而被驱动远离平衡。在临界热流密度下,我们发现系统发生连续相变,转变为可移动壁一侧为低密度热气体、另一侧为高密度冷气体的状态。软球流体的分子动力学模拟证实了该相变在相互作用系统中同样存在。我们引入了一个稳态类亥姆霍兹函数,其极小值决定内壁的稳定位置。这一相变可作为稳态相变的范式,而该类亥姆霍兹函数可作为这些状态热力学描述的范式。

英文摘要:

We discovered an out-of-equilibrium transition in the ideal gas between two walls, divided by an inner, adiabatic, movable wall. The system is driven out-of-equilibrium by supplying energy directly into the volume of the gas. At critical heat flux, we have found a continuous transition to the state with a low-density, hot gas on one side of the movable wall and a dense, cold gas on the other side. Molecular dynamic simulations of the soft-sphere fluid confirm the existence of the transition in the interacting system. We introduce a stationary state Helmholtz-like function whose minimum determines the stable positions of the internal wall. This transition can be used as a paradigm of transitions in stationary states and the Helmholtz-like function as a paradigm of the thermodynamic description of these states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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