Numerical Modeling of Mudflows
- 1 July 1997
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Hydraulic Engineering
- Vol. 123 (7), 617-623
- https://doi.org/10.1061/(asce)0733-9429(1997)123:7(617)
Abstract
To predict mudflow dynamics a numerical model based on shallow-water equations is developed. Previous work has shown that mudflow behavior can be well represented by a Herschel-Bulkley model. In a laminar regime, generally observed in practice, a wall friction force expression has been theoretically deduced for steady uniform flows. For unsteady flows the wall friction force is assumed to be equal to the resistance of a steady uniform flow with the same depth and mean velocity. The numerical model parameters, directly deduced from Herschel-Bulkley model, are determined independently by rheological measurements. Because of the lack of precise field data, experimental results obtained on a physical model are used in order to validate the numerical model. The main features of the experimental transient flows carried out in a laboratory flume are, for some identified conditions, in fairly good agreement with numerical model predictions, without any additional parameter fitting.This publication has 17 references indexed in Scilit:
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