Explicit particle-dynamics model for granular materials

Conference · Sat May 01 04:00:00 EDT 1982

OSTI ID:6429108

Walton, O R

Discrete-particle simulation of granular-material motion is developing into a viable method for studying how various interparticulate forces affect the bulk behavior of granular solids. A two-dimensional, polygonal-particle computer model, developed from the ideas of Cundall (1976), and incorporating other techniques from molecular dynamics, is being used in a study of the flow behavior of rubblized oil shale. Direct comparison with physical tests involving multiblock systems have verified the model's ability to predict the motion of real materials. Computer generated movies and high-speed motion pictures of physical tests involving gravity flow of 2-dimensional polygonal particles show formation of temporary arches followed by dynamic rupture and reformation of new arches. Direct shear tests on oil-shale rubble involving very large displacements indicate significant circulatory motion in the rubble. Computer simulation of the direct shear tests show similar behavior.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6429108
• Report Number(s): UCRL-86266; CONF-8205151-1; ON: DE83006411
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
041000 -- Oil Shales & Tar Sands-- Environmental Aspects
500100* -- Environment
Atmospheric-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
BEHAVIOR
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
COMPUTER CODES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GRANULAR MATERIALS
MANAGEMENT
MATERIALS
MECHANICAL PROPERTIES
OIL SHALES
PARTICLES
PARTICULATES
POWDERS
SHEAR PROPERTIES
SOLIDS
SPOIL BANKS
TENSILE PROPERTIES
WASTE MANAGEMENT