Effect of Coulomb friction on orientational correlation and velocity distribution functions in a sheared dilute granular gas
Bishakhdatta Gayen, Meheboob Alam
PHYSICAL REVIEW E | AMER PHYSICAL SOC | Published : 2011
From particle simulations of a sheared frictional granular gas, we show that the Coulomb friction can have dramatic effects on orientational correlation as well as on both the translational and angular velocity distribution functions even in the Boltzmann (dilute) limit. The dependence of orientational correlation on friction coefficient (μ) is found to be nonmonotonic, and the Coulomb friction plays a dual role of enhancing or diminishing the orientational correlation, depending on the value of the tangential restitution coefficient (which characterizes the roughness of particles). From the sticking limit (i.e., with no sliding contact) of rough particles, decreasing the Coulomb friction is..View full abstract
Awarded by DAE-SRC by the Department of Atomic Energy, Government of India
M.A. acknowledges financial support from the DAE-SRC award (Grant No. DAE/MA/4265) by the Department of Atomic Energy, Government of India.