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| Titel |
Two-phase and three-dimensional simulations of complex fluid-sediment transport down a slope and impacting water bodies |
| VerfasserIn |
Shiva P. Pudasaini, Parameshwari Kattel, Jeevan Kafle, Puskar R. Pokhrel, Khim B. Khattri |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250090825
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| Publikation (Nr.) |
 EGU/EGU2014-5084.pdf |
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| Zusammenfassung |
| We present a technique that simulates transport and flow of a real two-phase fluid (a mixture
of fluid and sediment particles) down three-dimensional slopes and channels. This
technique combines novel mechanics formulations and modeling into a unified
high-resolution framework, providing a unique opportunity to simulate two-phase subearial
landslides and debris flows with dynamically changing concentrations of solid particles.
This mixture then impacts downslope with particle-laden fluid reservoirs, rivers,
fjords, lakes, or oceans. This results in a super tsunami wave in the fluid body,
while the submarine debris flow moves along the bathymetry. The same modelling
technique can be applied to simulate rock-ice avalanches and turbidity currents with
changing physical properties and mechanical responses of the phases that enhances
the flow mobility. These results fundamentally advance our present knowledge
associated with the complex mechanics and dynamics of multi-phase geophysical mass
flows, including the subearial and submarine sediment transport and deposition
processes. Our findings contribute significantly to our understanding of mixing and
separation between phases, generation and propagation of special solid and fluid
structures, and phase-transitions during the flow process. Finally, these results provide
new insights into the evolution of morphodynamics of steep mountain slopes and
channels.
References
Pudasaini, S. P. A general two-phase debris flow model. Journal of Geophysical Research,
117, F03010, 2012. doi: 10.1029/2011JF002186.
Pudasaini, S. P. and Miller, S. A. A real two-phase submarine debris flow and tsunami.
American Institute of Physics Proceedings, 1479, 197-200, 2012. doi: 10.1063/1.4756096. |
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