Rheological properties of simulated debris flows in the laboratory environment

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Edited by:
French Richard H.


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Steady debris flows with or without a snout are simulated in a 'conveyor-belt' flume using dry glass spheres of a uniform size, 5 or 14 mm in diameter, and their rheological properties described quantitatively in constants in a generalized viscoplastic fluid (GVF) model. Close agreement of the measured velocity profiles with the theoretical ones obtained from the GVF model strongly supports the validity of a GVF model based on the continuum-mechanics approach. Further comparisons of the measured and theoretical velocity profiles along with empirical relations among the shear stress, the normal stress, and the shear rate developed from the 'ring-shear' apparatus determine the values of the rheological parameters in the GVF model, namely the flow-behavior index, the consistency index, and the cross-consistency index. Critical issues in the evaluation of such rheological parameters using the conveyor-belt flume and the ring-shear apparatus are thus addressed in this study.

Additional publication details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Rheological properties of simulated debris flows in the laboratory environment
Year Published:
Publ by ASCE
Publisher location:
Boston, MA, United States
Larger Work Title:
Hydraulics/Hydrology of Arid Lands
First page:
Last page:
Conference Title:
Proceedings of the International Symposium on Hydraulics/Hydrology of Arid Lands and 1990 National Conference on Hydraulic Engineering
Conference Location:
San Diego, CA, USA
Conference Date:
30 July 1990 through 2 August 1990