Viscoplastic dambreak waves: Review of simple computational approaches and comparison with experiments

Ancey, Christophe; Andreini, Nicolas; Épely-Chauvin, Gaël

doi:10.1016/j.advwatres.2012.03.015

Cited by 35 publications

(23 citation statements)

References 42 publications

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“…In what follows the curvature effects have been neglected (Di Nucci et al, 2007, 2011. Moreover, supposing that: -spatial variations occur over scales larger than flow depth; -flow resistance by the sidewalls is negligible with respect to that by bottom; -momentum correction factor is equal to unity; -surface tension is negligible; the dimensional depth-averaged momentum and mass conservation equations are (Ancey et al, 2012)…”

Section: Governing Equationsmentioning

confidence: 99%

“…For the Herschel and Bulkley flow model, the shear stress at the bottom (  τ b ) is expressed by the following relation (Ancey et al, 2012):…”

Section: Governing Equationsmentioning

confidence: 99%

“…In this paper, among the available Herschel and Bulkley formulations, i.e. three-equation (Balmforth and Liu, 2004;Di Cristo et al, 2013d;Huang and Garcia, 1998) or two-equation (Ancey, 2001(Ancey, , 2005Ancey et al, 2012;Coussot, 1997;Laigle and Coussot, 1997) models, the latter, which is more usually adopted in engineering applications, is considered.…”

Section: Introductionmentioning

confidence: 99%

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On the applicability of minimum channel length criterion for roll-waves in mud-flows

Cristo¹,

Iervolino²,

Vacca³

2013

Journal of Hydrology and Hydromechanics

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Abstract:The paper addresses the prediction of roll-waves occurrence in mud-flows. The spatial growth of a point-wise disturbance is analytically described, based on the linearized flow model of a Herschel and Bulkley fluid, in the neighborhood of an initial uniform base condition. The theoretical achievements allow to generalize to mud-flows the minimum channel criterion commonly used for the prediction of roll-waves in clear-water. The applicability of the criterion is discussed through the comparison with literature laboratory data concerning unstable flows without rollwaves.

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Section: Governing Equationsmentioning

confidence: 99%

“…For the Herschel and Bulkley flow model, the shear stress at the bottom (  τ b ) is expressed by the following relation (Ancey et al, 2012):…”

Section: Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the applicability of minimum channel length criterion for roll-waves in mud-flows

Cristo¹,

Iervolino²,

Vacca³

2013

Journal of Hydrology and Hydromechanics

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“…The study considers the one-layer one-dimensional Herschel-Bulkley model [3], which although less complete of the Huang and Garcia [21] one is mathematically more tractable and therefore more frequently adopted in engineering applications [1,2,4,10,24]. Following the technique used for clearwater by Tsai [36,37], a sinusoidal perturbation of the linearized flow model around an initial gradually-varied profile is considered.…”

Section: Introductionmentioning

confidence: 99%

Diffusive approximation for unsteady mud flows with backwater effect

Cristo

Iervolino²,

Vacca³

2015

Advances in Water Resources

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“…Such an approach is generally considered as state-of-the-art (Iverson, 1997), even if simpler approaches (such as the kinematic wave model) perform surprisingly better in some cases (Ancey et al, 2012).…”

Section: Shallow Flow Descriptionmentioning

confidence: 99%

Can the collapse of a fly ash heap develop into an air-fluidized flow? — Reanalysis of the Jupille accident (1961)

et al. 2015

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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.

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Viscoplastic dambreak waves: Review of simple computational approaches and comparison with experiments

Cited by 35 publications

References 42 publications

On the applicability of minimum channel length criterion for roll-waves in mud-flows

On the applicability of minimum channel length criterion for roll-waves in mud-flows

Diffusive approximation for unsteady mud flows with backwater effect

Can the collapse of a fly ash heap develop into an air-fluidized flow? — Reanalysis of the Jupille accident (1961)

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