Kinetic temperatures for a granular mixture.
Kinetic temperatures for a granular mixture.
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颗粒混合物的动力学温度。
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
J. Dufty
中科院分区：
文献类型：
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作者：
S. R. Dahl;C. Hrenya;V. Garzó;J. Dufty
一个孤立的混合物的光滑，无弹性的硬球支持一个均匀的冷却状态与不同的动力学温度为每个物种。在这里探索这种现象的分子动力学模拟的两种组分的流体，与预测的Enskog动力学理论。研究了恢复系数α =0.95和0.80的两个值的动力学温度的比率，作为质量比、尺寸比、组成和密度的函数。较低的密度和较高的恢复系数的理论和模拟之间的良好协议，观察到显着的分歧，否则。不同的温度的现象也讨论了驱动系统，在最近的实验中发生的。说明了自由冷却状态和驱动稳态之间的差异。
An isolated mixture of smooth, inelastic hard spheres supports a homogeneous cooling state with different kinetic temperatures for each species. This phenomenon is explored here by molecular dynamics simulation of a two component fluid, with comparison to predictions of the Enskog kinetic theory. The ratio of kinetic temperatures is studied for two values of the restitution coefficient alpha=0.95 and 0.80, as a function of mass ratio, size ratio, composition, and density. Good agreement between theory and simulation is found for the lower densities and higher restitution coefficient; significant disagreement is observed otherwise. The phenomenon of different temperatures is also discussed for driven systems, as occurs in recent experiments. Differences between the freely cooling state and driven steady states are illustrated.