Rheological properties of simulated debris flows in the laboratory environment
By: Chi-Hai Ling, Cheng-lung Chen, and Chyan-Deng Jan
Edited by: French Richard H.
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Abstract
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.
| 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 |
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