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| Titel |
Insight into the dynamics of granular column collapse using Discrete Element Methods and laboratory experiments |
| VerfasserIn |
Hugo Martin, Anne Mangeney, Maxime Farin, Patrick Richard |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250131539
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| Publikation (Nr.) |
 EGU/EGU2016-11962.pdf |
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| Zusammenfassung |
| The mechanical behavior of granular flows is still an open issue. In particular, quantitative
agreement between the detailed dynamics of the flow and laboratory experiments is necessary
to better constrain the performance and limits of the models. We propose here to compare
quantitatively the flow profiles and the force during granular column collapse simulated using
Discrete Element Models and laboratory experiments. These small scale experiments are
performed with dry granular material released initially from a cylinder on a sloping
plane. The flow profiles and the acoustic signal generated by the granular impacts
and stresses on the plane are recorded systematically [Farin et al., 2015]. These
experiments are simulated using the Discrete Element Method Modys [Richard et al.,
2000]. We show that the effect of the removing gate should be taken into account
in the model in order to quantatively reproduce the flow dynamics. Furthermore
we compare the simulated and observed acoustic signals that are generated by the
fluctuating stresses exerted by the grains on the substrate in different frequency
bands.
[1] P. Richard et Luc Oger. 2000 Etude de la géométrie de milieux granulaires modèles
tridimensionnels par simulation numérique.
[2] Farin, M., Mangeney, A., Toussaint, R., De Rosny, J., Shapiro, N., Dewez, T., Hibert,
C., Mathon, C., Sedan, O., Berger. 2015, Characterization of rockfalls from seismic signal:
insights from laboratory experiments |
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