Rheological properties of simulated debris flows in the laboratory environment

By: , and 
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
Title Rheological properties of simulated debris flows in the laboratory environment
ISBN 0872627713
Year Published 1990
Language English
Publisher Publ by ASCE
Publisher location Boston, MA, United States
Larger Work Title Hydraulics/Hydrology of Arid Lands
First page 218
Last page 224
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