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MODELLING OF DAM-BREAK SEDIMENT FLOWS
Abstract Dam-break sediment flow is an especially rapid unsteady flow, important in terms of risk assessment, mainly observed in flow-type landslides and dam breaks. The paper presents MUDEP, a computational model under development in IST, Lisbon, Portugal, to model such flows, using the l-D explicit differential TVD MacCormack scheme to solve the adapted St-Venant equations. The function calculating the friction slope varies according to the rheological model. In order to verify the results, experiments were performed in a tilting flume, using a highly viscous oil to simulate the expected laminar behaviour of such flows. The fluid was suddenly released down a slope by the removal of a gate. The comparisons of the computational and experimental results demonstrate the validity of the developed model.
MODELLING OF DAM-BREAK SEDIMENT FLOWS
Abstract Dam-break sediment flow is an especially rapid unsteady flow, important in terms of risk assessment, mainly observed in flow-type landslides and dam breaks. The paper presents MUDEP, a computational model under development in IST, Lisbon, Portugal, to model such flows, using the l-D explicit differential TVD MacCormack scheme to solve the adapted St-Venant equations. The function calculating the friction slope varies according to the rheological model. In order to verify the results, experiments were performed in a tilting flume, using a highly viscous oil to simulate the expected laminar behaviour of such flows. The fluid was suddenly released down a slope by the removal of a gate. The comparisons of the computational and experimental results demonstrate the validity of the developed model.
MODELLING OF DAM-BREAK SEDIMENT FLOWS
SILVA, JOSE MATOS (author)
2007-01-01
11 pages
Article/Chapter (Book)
Electronic Resource
English
Debris Flow , Total Variation Diminish , Sediment Flow , Upstream Boundary Condition , Friction Slope Environment , Pollution, general , Environmental Monitoring/Analysis , Water Quality/Water Pollution , Calculus of Variations and Optimal Control; Optimization , Atmospheric Protection/Air Quality Control/Air Pollution , Soil Science & Conservation
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