Journal article

Orientational correlation and velocity distributions in uniform shear flow of a dilute granular gas

Bishakdatta Gayen, Meheboob Alam

PHYSICAL REVIEW LETTERS | AMER PHYSICAL SOC | Published : 2008

Abstract

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 expone..

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