二维Yukawa液体的时间关联函数和输运系数
Time correlation functions and transport coefficients of two-dimensional Yukawa liquids
摘要：
二维（2D）液体的扩散系数，粘度和导热系数的存在性进行检查。平衡分子动力学模拟进行使用汤川势，并测试的自相关函数的长时间行为。与以前的二维汤川液体模拟相比，这里报告的进展包括热导率的评估，使用更大的系统尺寸以允许更长时间的有意义的检查，以及改进分析方法的开发。我们发现，输运系数存在的扩散在高温下，和粘度在低温下，但不是在相反的限制。在高温下，导热系数似乎不存在。计算能力的进一步发展可以通过允许更大的系统规模和更长的时间序列来改善这些评估。
英文摘要：
The existence of coefficients for diffusion, viscosity and thermal conductivity is examined for two-dimensional (2D) liquids. Equilibrium molecular dynamics simulations are performed using a Yukawa potential, and the long-time behavior of autocorrelation functions is tested. Advances reported here as compared to previous 2D Yukawa liquid simulations include an assessment of the thermal conductivity, using a larger system size to allow meaningful examination of longer times, and development of improved analysis methods. We find that the transport coefficient exists for diffusion at high temperature, and viscosity at low temperature, but not in the opposite limits. The thermal conductivity coefficient does not appear to exist at high temperature. Further advances in computing power could improve these assessments by allowing even larger system sizes and longer time series.
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