Physics – Condensed Matter – Materials Science
Scientific paper
2003-02-17
Physics
Condensed Matter
Materials Science
20 pages, 19 figures, submitted to Phys. Rev. E
Scientific paper
10.1103/PhysRevE.68.021301
The continuum theory of partially fluidized shear granular flows is tested and calibrated using two dimensional soft particle molecular dynamics simulations. The theory is based on the relaxational dynamics of the order parameter that describes the transition between static and flowing regimes of granular material. We define the order parameter as a fraction of static contacts among all contacts between particles. We also propose and verify by direct simulations the constitutive relation based on the splitting of the shear stress tensor into a``fluid part'' proportional to the strain rate tensor, and a remaining ``solid part''. The ratio of these two parts is a function of the order parameter. The rheology of the fluid component agrees well with the kinetic theory of granular fluids even in the dense regime. Based on the hysteretic bifurcation diagram for a thin shear granular layer obtained in simulations, we construct the ``free energy'' for the order parameter. The theory calibrated using numerical experiments with the thin granular layer is applied to the surface-driven stationary two dimensional granular flows in a thick granular layer under gravity.
Aranson Igor S.
Tsimring Lev S.
Volfson Dmitri
No associations
LandOfFree
Partially fluidized shear granular flows: Continuum theory and MD simulations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Partially fluidized shear granular flows: Continuum theory and MD simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Partially fluidized shear granular flows: Continuum theory and MD simulations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-381246