Dense inclined flows: Theory and experiments
Rapid, gravity-driven flows of granular materials 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. Thus 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, we have developed the dynamics of frictional spheres and begun an analysis of flow in a rotating drum. For the experiments, we have designed the principal components of the chute facility in concert with the University of Florida, where a similar chute will be constructed. 4 refs.
- Research Organization:
- Cornell Univ., Ithaca, NY (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC22-91PC90183
- OSTI ID:
- 5629957
- Report Number(s):
- DOE/PC/90183-T1; ON: DE91014248
- Country of Publication:
- United States
- Language:
- English
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Dense inclined flows: Theory and experiments. Quarterly technical progress report, January 1, 1995--March 31, 1995
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