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| Titel |
Simulation of the effect of defence structures on granular flows using SPH |
| VerfasserIn |
P. Lachamp, T. Faug, M. Naaim, D. Laigle |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 2, no. 3/4 ; Nr. 2, no. 3/4, S.203-209 |
| Datensatznummer |
250000281
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| Publikation (Nr.) |
 copernicus.org/nhess-2-203-2002.pdf |
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| Zusammenfassung |
| This paper presents the SPH (Smoothed
Particles Hydrodynamics) numerical method adapted to complex rheology and
free surface flow. It has been developed to simulate the local effect of a
simple obstacle on a granular flow. We have introduced this specific
rheology to the classical formalism of the method and thanks to
experimental devices, we were able to validate the results. Two viscosity
values have been simultaneously computed to simulate "plugs" and
"dead zone" with the same code. First, some experiments have
been done on a simple inclined slope to show the accuracy of the numerical
results. We have fixed the mass flow rate to see the variations of the
flow depth according to the channel slope. Then we put a weir to block the
flow and we analysed the dependence between the obstacle height and the
length of influence upstream from the obstacle. After having shown that
numerical results were consistent, we have studied speed profiles and
pressure impact on the structure. Also results with any topography will be
presented. This will have a great interest to study real flow over natural
topography while using the model for decision help. |
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