Dense inclined flows: Theory and experiments

Technical Report · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5297201

Rapid, gravity-driven flows of granular materials such as, for example, coal, down inclines pose a challenge to our understanding. Even in situations in which the flow is steady and two-dimensional, the details of how momentum and energy are balanced within the flow and at the bottom boundary are not well understood. We have undertaken a research program integrating theory, computer simulation, and experiment that will focus on dense entry flows down inclines. Its goal is to understand the regime of inclined flow that involves a large, relatively passive mass of granular material moving above a narrow region of intensely sheared, colliding grains. The effort involves the development of theory informed by the results of simultaneous computer simulations and the construction, instrumentation, and use of an experimental facility in which the variables necessary to assess the success or failure of the theory can be measured. In the present reporting period, a recently developed theory for identical spheres interacting through frictional collisions has been applied to inclined flows and to shearing flows driven by the relative motion of parallel boundaries. A variety of boundary conditions have been employed. Also, we have started construction of the chute facility and we have conceived and partially assembled an experiment to measure the parameters that characterize collisions between two small glass particles. 3 refs., 1 fig.

• Research Organization: Cornell Univ., Ithaca, NY (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-91PC90183
• OSTI ID: 5297201
• Report Number(s): DOE/PC/90183-T2; ON: DE91018158
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
SOLIDS FLOW
GRANULAR MATERIALS
BOUNDARY CONDITIONS
COMPUTERIZED SIMULATION
PROGRESS REPORT
SHEAR
CARBONACEOUS MATERIALS
DOCUMENT TYPES
ENERGY SOURCES
FLUID FLOW
FOSSIL FUELS
FUELS
MATERIALS
SIMULATION
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage