Wang, Yongqi ; Hutter, Kolumban ; Gray, J. M. N. T. ; Tai, Yih-Chin
Hrsg.: Wieczorek, Gerald F. ; Naeser, Nancy D. (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
Buchkapitel, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Buchkapitel |
|---|---|
| Erschienen: | 2000 |
| Herausgeber: | Wieczorek, Gerald F. ; Naeser, Nancy D. |
| Autor(en): | Wang, Yongqi ; Hutter, Kolumban ; Gray, J. M. N. T. ; Tai, Yih-Chin |
| Art des Eintrags: | Bibliographie |
| Titel: | Gravity-driven shear flow of a sediment-water mixture: Comparison of theory and experiment |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Januar 2000 |
| Ort: | Rotterdam |
| Verlag: | Balkema |
| Buchtitel: | 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 |
| Kurzbeschreibung (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. |
| Fachbereich(e)/-gebiet(e): | Studienbereiche 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy) Studienbereiche > Studienbereich Mechanik |
| Hinterlegungsdatum: | 24 Aug 2011 18:22 |
| Letzte Änderung: | 19 Feb 2019 15:10 |
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