Reference : Can the collapse of a fly ash heap develop into an air-fluidized flow? - Reanalysis o...
Scientific journals : Article
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/163306
Can the collapse of a fly ash heap develop into an air-fluidized flow? - Reanalysis of the Jupille accident (1961)
English
Stilmant, Frédéric mailto [Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering) >]
Pirotton, Michel mailto [Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering) >]
Archambeau, Pierre mailto [Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering) >]
Erpicum, Sébastien mailto [Université de Liège - ULiège > > Scientifiques attachés au Doyen (Sc.appliquées) >]
Dewals, Benjamin mailto [Université de Liège - ULiège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering >]
1-Jan-2015
Geomorphology
Elsevier Science
228
746-755
Yes (verified by ORBi)
International
0169-555X
Amsterdam
The Netherlands
[en] Landslide ; Fluidization ; Numerical modeling ; Fly ash
[en] A fly ash heap collapse occurred in Jupille (Liege, Belgium) in 1961. The subsequent flow of fly ash reached a surprisingly long runout and had catastrophic consequences. Its unprecedented degree of fluidization attracted scientific attention. As drillings and direct observations revealed no water-saturated zone at the base of the deposits, scientists assumed an air-fluidization mechanism, which appeared consistent with the properties of the material. In this paper, the air-fluidization assumption is tested based on two-dimensional numerical simulations. The numerical model has been developed so as to focus on the most prominent processes governing the flow, with parameters constrained by their physical interpretation. Results are compared to accurate field observations and are presented for different stages in the model enhancement, so as to provide a base for a discussion of the relative influence of pore pressure dissipation and pore pressure generation. These results show that the apparently high diffusion coefficient that characterizes the dissipation of air pore pressures is in fact sufficiently low for an important degree of fluidization to be maintained during a flow of hundreds of meters.
Aquapôle
Researchers ; Professionals
http://hdl.handle.net/2268/163306
10.1016/j.geomorph.2014.01.020
http://www.sciencedirect.com/science/article/pii/S0169555X1400066X
The final publication is available via http://www.sciencedirect.com/science/article/pii/S0169555X1400066X

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