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摘要翻译：
通过对粗糙稀颗粒气体均匀剪切流的粒子模拟，我们发现在弹性碰撞($E=1$)的完全光滑极限($\beta=-1$)和粗糙极限($\beta=1$)处，平移速度和旋转速度在方向上都有强相关，但不存在由取向相关引起的奇异性；在这两种极限情况下，平动速度分布函数和旋转速度分布函数都保持接近高斯分布。在这两个极限之外，方位和空间速度相关导致了非高斯高速尾的出现。两个分布函数的尾部都遵循拉伸指数，指数依赖于正态($E$)和切向($\beta$)恢复系数。
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英文标题：
《Orientational correlation and velocity distributions in uniform shear
flow of a dilute granular gas》
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作者：
Bishakdatta Gayen and Meheboob Alam
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Soft Condensed Matter 软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
Using particle simulations of the uniform shear flow of a rough dilute granular gas, we show that the translational and rotational velocities are strongly correlated in direction, but there is no orientational correlation-induced singularity at perfectly smooth ($\beta=-1$) and rough ($\beta=1$) limits for elastic collisions ($e=1$); both the translational and rotational velocity distribution functions remain close to a Gaussian for these two limiting cases. Away from these two limits, the orientational as well as spatial velocity correlations are responsible for the emergence of non-Gaussian high velocity tails. The tails of both distribution functions follow stretched exponentials, with the exponents depending on normal ($e$) and tangential ($\beta$) restitution coefficients.
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PDF链接：
https://arxiv.org/pdf/802.0056
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