Orientational correlation and velocity distributions in uniform shear flow of a dilute granular gas
Autor: | Gayen, Bishakdatta, Alam, Meheboob |
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Rok vydání: | 2008 |
Předmět: | |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevLett.100.068002 |
Popis: | 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. Comment: Physical Review Letters (accepted) |
Databáze: | arXiv |
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