Wang, Yongqi ; Hutter, Kolumban ; Gray, J. M. N. T. ; Tai, Yih-Chin
Wieczorek, Gerald F. ; Naeser, Nancy D. (eds.) (2000):
Gravity-driven shear flow of a sediment-water mixture: Comparison of theory and experiment.
In: Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment : Proceedings of the Second International Conference on Debris-Flow Hazards Mitigation, Taipei, Taiwan, 16-18 August 2000, pp. 381-386, Rotterdam, Balkema, ISBN 905809149X,
[Book Section]
Abstract
A constitutive theory, which is based on the second law of thermodynamics and describes the flow of water-saturated granular materials, is briefly summarized. Experiments determining the grain flow velocity of a water-granular mixture down an inclined chute were performed using a CCD (charge-coupled device) camera to identify the particle velocities. Comparison of numerical results of the theory on gravity-driven shear flow of this binary mixture with the experimential data demonstrates qualitative agreement. The theory and the experiment prove that for a granular-fluid flow down a rough inclined chute, a layer of high shear rate occurs in the vicinity of the bottom, whose thickness is of the order of 10 - 15 grain diameters. Above this layer a plug-like region develops in which the velocity is almost constant.
| Item Type: | Book Section |
|---|---|
| Erschienen: | 2000 |
| Editors: | Wieczorek, Gerald F. ; Naeser, Nancy D. |
| Creators: | Wang, Yongqi ; Hutter, Kolumban ; Gray, J. M. N. T. ; Tai, Yih-Chin |
| Title: | Gravity-driven shear flow of a sediment-water mixture: Comparison of theory and experiment |
| Language: | English |
| Abstract: | A constitutive theory, which is based on the second law of thermodynamics and describes the flow of water-saturated granular materials, is briefly summarized. Experiments determining the grain flow velocity of a water-granular mixture down an inclined chute were performed using a CCD (charge-coupled device) camera to identify the particle velocities. Comparison of numerical results of the theory on gravity-driven shear flow of this binary mixture with the experimential data demonstrates qualitative agreement. The theory and the experiment prove that for a granular-fluid flow down a rough inclined chute, a layer of high shear rate occurs in the vicinity of the bottom, whose thickness is of the order of 10 - 15 grain diameters. Above this layer a plug-like region develops in which the velocity is almost constant. |
| Book Title: | Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment : Proceedings of the Second International Conference on Debris-Flow Hazards Mitigation, Taipei, Taiwan, 16-18 August 2000 |
| Place of Publication: | Rotterdam |
| Publisher: | Balkema |
| ISBN: | 905809149X |
| Divisions: | Study Areas 16 Department of Mechanical Engineering 16 Department of Mechanical Engineering > Fluid Dynamics (fdy) Study Areas > Study Area Mechanic |
| Date Deposited: | 24 Aug 2011 18:22 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Send an inquiry |
Options (only for editors)
 |
Show editorial Details |
Drucken
Impressum