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arXiv 1707.04023cond-mat.stat-mech
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广义活塞模型中的傅里叶定律

Fourier's Law in a Generalized Piston Model

Lorenzo Caprini, Luca Cerino, Alessandro Sarracino, Angelo Vulpiani

摘要:

本文在动力学理论的框架内讨论了一个简化的、但非平凡的力学模型--由质量为$M$的$n$移动绝热壁隔开的盒子中质量为$m$的$N$粒子组成的气体与两个不同温度的热浴相互作用。根据Smoluchowski的方法,从碰撞粒子/壁的分析中,我们导出了稳态非平衡态的主要热力学量的值。结果进行了比较,广泛的数值模拟,在大的$n$,$mN/M\gg 1$和$m/M \ll 1$的限制,我们发现一个很好的近似傅立叶定律。

英文摘要:

A simplified, but non trivial, mechanical model -- gas of $N$ particles of mass $m$ in a box partitioned by $n$ mobile adiabatic walls of mass $M$ -- interacting with two thermal baths at different temperatures, is discussed in the framework of kinetic theory. Following an approach due to Smoluchowski, from an analysis of the collisions particles/walls, we derive the values of the main thermodynamic quantities for the stationary non-equilibrium states. The results are compared with extensive numerical simulations; in the limit of large $n$, $mN/M\gg 1$ and $m/M \ll 1$, we find a good approximation of Fourier's law.

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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