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Gravity-driven shear flow of a sediment-water mixture: Comparison of theory and experiment

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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