The "adiabatic" piston: And yet it moves
The "adiabatic" piston: And yet it moves
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DOI：
10.1209/epl/i2000-00129-8
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发表时间：
2000-01-01
期刊：
影响因子：
--
通讯作者：
Mansour, MM
中科院分区：
文献类型：
--
作者：
Kestemont, E;Van den Broeck, C;Mansour, MM
我们对一个由绝缘活塞组成的系统进行了分子动力学模拟，该活塞分离两种气体的硬盘，每个气体最初在相同的压力下处于平衡状态，但在不同的温度和密度下。当释放活塞时，我们监测系统如何在两侧温度和密度相等的情况下返回到全局热力学平衡。活塞到达其最终位置的过程符合指数规律，而热流密度与温差成正比，这是一个很好的近似。
We perform molecular dynamic simulations of a system consisting of an insulating piston, which separates two gases of hard disks, each initially at equilibrium at the same pressure but at different temperatures and densities. Upon releasing the piston, we monitor how the system returns to the global thermodynamic equilibrium with equal temperature and density on both sides. The approach of the piston to its final position is well described by an exponential law, while the heat flux is, to a good approximation, found to be proportional to the temperature difference.