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Dense inclined flows: Theory and experiments. Quarterly technical progress report, January 1, 1995--March 31, 1995
| 题名： | Dense inclined flows: Theory and experiments. Quarterly technical progress report, January 1, 1995--March 31, 1995 |
| 作者： | Louge, M.Y.;Jenkins, J.T.; |
| 关键词： | 01 COAL, LIGNITE, AND PEAT; GRANULAR MATERIALS; SOLIDS FLOW; PROGRESS REPORT; COMPUTERIZED SIMULATION; COLLISIONS; INCLINATION; EXPERIMENTAL DATA |
| 摘要： | 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. 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 continued a series of measurements in the chute facility with a flat, frictional boundary. At several inclinations between 15.5{degrees} and 20{degrees}, and at several gate openings for each angle, we have measured mass flow rate and mass holdup, as well as granular temperature and collision frequency at the bottom wall of the chute. By recording simultaneously the collisional normal stress at the bottom wall and the mass holdup above it, the experiments reveal the fraction of the weight of particles that is supported by direct impact. |
| 总页数： | 9p |
| 报告类型： | 科技报告 |
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