Order parameter description of stationary partially fluidized shear granular flows.

Journal Article · Fri Jun 27 04:00:00 EDT 2003 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.90.254301· OSTI ID:961365

Volfson, D; Tsimring, L S; Aranson, I S

We carry out a detailed comparison of soft-particle molecular dynamics simulations with the theory of partially fluidized shear granular flows. We verify by direct simulations a constitutive relation based on the separation 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 components is determined by the order parameter. Based on results of the simulations we construct the 'free energy' function for the order parameter. We also present the simulations of the stationary deep 2D granular flows driven by an upper wall and compare it with the continuum theory.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 961365
• Report Number(s): ANL/MSD/JA-47137
• Journal Information: Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: 25 ; Jun. 27, 2003 Vol. 90; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
DYNAMICS
ENERGY
FLUIDS
FUNCTIONS
MOLECULAR DYNAMICS METHOD
ORDER PARAMETERS
SHEAR
SOLIDS
STRAIN RATE
TENSORS