Insights into the Second Law of Thermodynamics from Anisotropic Gas-Surface Interactions

Abstract

Thermodynamic implications of anisotropic gas-surface interactions in a closed molecular flow cavity are examined. Anisotropy at the microscopic scale, such as might be caused by reduced-dimensionality surfaces, is shown to lead to reversibility at the macroscopic scale. The possibility of a self-sustaining nonequilibrium stationary state induced by surface anisotropy is demonstrated that simultaneously satisfies flux balance, conservation of momentum, and conservation of energy. Conversely, it is also shown that the second law of thermodynamics prohibits anisotropic gas-surface interactions in "equilibrium", even for reduced dimensionality surfaces. This is particularly startling because reduced dimensionality surfaces are known to exhibit a plethora of anisotropic properties. That gas-surface interactions would be excluded from these anisotropic properties is completely counterintuitive from a causality perspective. These results provide intriguing insights into the second law of thermodynamics and its relation to gas-surface interaction physics.

arXiv comment28 pages, 11 figures

References in corpus (7)

• The Nonequilibrium Thermodynamics of Small Systems
• Quantized phonon specrum of single-wall carbon nanotubes
• Statistical Mechanics: A Selective Review of Two Central Issues
• Towards a first-principles theory of surface thermodynamics and kinetics
• Quantum Approach to a Derivation of the Second Law of Thermodynamics
• Ergodicity, ensembles, irreversibility in Boltzmann and beyond
• Note on nonequilibrium stationary states and entropy

Cited by in corpus (1)

• Testing the limits of the Maxwell distribution of velocities for atoms flying nearly parallel to the walls of a thin cell