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arXiv 1102.2257cond-mat.stat-mechphysics.chem-phphysics.flu-dyn
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非平衡态斑图形成的热力学

Thermodynamics for Non-equilibrium Pattern Formation

Phil Attard

摘要:

非平衡态热力学的第二熵理论表明,含时系统的最佳结构或模式对应于最大熵。导出了对流热流总熵的计算公式。本文用傅立叶展开法求解了Boussinesq近似下的纳维-斯托克斯方程。速度幅值的结果与以前的计算和实验测量结果吻合得很好。对于文献中报道的直辊状态之间的自发跃迁,它示出,测量的对流模式波长的变化对应于熵的增加。本文已被arXiv:1208.5105v1取代。

英文摘要:

The second entropy theory for non-equilibrium thermodynamics is used to show that the optimum structure or pattern of a time-dependent system corresponds to the maximum entropy. A formula for the total entropy of convective heat flow is derived. The Navier-Stokes equations in Boussinesq approximation for straight roll convection are solved by a Fourier expansion technique. Results for the velocity amplitude are in good agreement with previous computations and experimental measurements. For the spontaneous transitions between straight roll states reported in the literature, it is shown that the measured change in convective pattern wave length corresponds to an increase in the entropy. This paper has been superseded by arXiv:1208.5105v1.

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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