Similar Search Results

Comparison of risk from pyroclastic density current hazards to critical infrastructure in Mammoth Lakes, California, USA, from a new Inyo craters rhyolite dike eruption versus a da...

Kaye, Grant; Cole, Jim; King, Andrew; Johnston, David - In: Natural Hazards 49 (2009) 3, pp. 541-563

Renewed volcanic activity near Mammoth Lakes, California, in the form of dome-collapse pyroclastic density currents (PDCs) from either a new eruption at Mammoth Mountain or the Inyo craters would pose a significant hazard to critical infrastructure there. This paper compares the risk from PDC...

Persistent link: https://www.econbiz.de/10010996363

Comparison of risk from pyroclastic density current hazards to critical infrastructure in Mammoth Lakes, California, USA, from a new Inyo craters rhyolite dike eruption versus a da...

Kaye, Grant; Cole, Jim; King, Andrew; Johnston, David - In: Natural Hazards 51 (2009) 3, pp. 477-499

Persistent link: https://www.econbiz.de/10010996953

Mapping block-and-ash flow hazards based on Titan 2D simulations: a case study from Mt. Taranaki, NZ

Procter, Jonathan; Cronin, Shane; Platz, Thomas; Patra, … - In: Natural Hazards 53 (2010) 3, pp. 483-501

Numerical models for simulation of mass flows are typically focussed upon accurately predicting the paths, travel times and inundation from a single flow or collapse event. When considering catchment-based hazards from a volcano, this is complicated by often being faced with several possible...

Persistent link: https://www.econbiz.de/10010995595

The importance of digital elevation model resolution on granular flow simulations: a test case for Colima volcano using TITAN2D computational routine

Capra, L.; Manea, V.; Manea, M.; Norini, G. - In: Natural Hazards 59 (2011) 2, pp. 665-680

terrain. Digital Elevation Model (DEM) is a common input for the simulation algorithm and its accuracy to reproduce past flows …-m DEMs. However, for the coarser 90-m DEM results are largely different and inaccurate. We recommend generating a … topographies, a DEM with high resolution should be used for more confident results. Copyright Springer Science+Business Media B …

Persistent link: https://www.econbiz.de/10010996110

Numerical issues in computing inundation areas over natural terrains using Savage-Hutter theory

Yu, Bin; Dalbey, Keith; Webb, Amy; Bursik, Marcus; … - In: Natural Hazards 50 (2009) 2, pp. 249-267

When characterizing geologic natural hazards, specifically granular flows including pyroclastic flows, debris avalanches and debris flows, perhaps the most important factor to consider is the area of inundation. One of the key parameters demarcating the leading edge of inundation is the run-out...

Persistent link: https://www.econbiz.de/10010846398

Asymptotic theory of two-phase gas-solid flow through a vertical tube at moderate pressure gradient

Sergeev, Y.A.; Zhurov, A.I. - In: Physica A: Statistical Mechanics and its Applications 236 (1997) 3, pp. 243-267

Based on the equations, constitutive relations and boundary conditions of the kinetic theory of colliding particles in a gas-solid suspension, the approximate theory of the steady, developed vertical flow of a gas-particulate mixture is developed for the case of moderate gas pressure gradient in...

Persistent link: https://www.econbiz.de/10010872903

Chaotic behavior in a model for grain dynamics

Vasconcelos, G.L; Cunha-Jr, F.V; Veerman, J.J.P - In: Physica A: Statistical Mechanics and its Applications 295 (2001) 1, pp. 261-267

A simple model is presented for the motion of a grain down a rough inclined surface. Considering that the surface has a periodic profile and adopting a simple collision law, we arrive at a model in which the dynamics is described by a three-dimensional map. As the surface inclination increases,...

Persistent link: https://www.econbiz.de/10010874085

Some considerations on the Bouchaud–Cates–Ravi–Edwards model for granular flow

Alamino, Roberto C.; Prado, Carmen P.C. - In: Physica A: Statistical Mechanics and its Applications 308 (2002) 1, pp. 148-160

We discuss some features of the BCRE model. Under some conditions, we show that it can be understood as a mapping from a two-dimensional to a one-dimensional problem. We then propose some modifications that (a) guarantee mass conservation (which is not assured in its original form) and (b)...

Persistent link: https://www.econbiz.de/10010872224

SURFACE GRANULAR FLOWS: TWO RELATED EXAMPLES

KHAKHAR, D. V.; ORPE, ASHISH V.; OTTINO, J. M. - In: Advances in Complex Systems (ACS) 04 (2001) 04, pp. 407-417

Granular surface flows are common in industrial practice and natural systems, however, theoretical description of such flows is at present incomplete. Two prototype systems involving surface flow are compared: heap formation by pouring at a point and rotating cylinders. Continuum models for...

Persistent link: https://www.econbiz.de/10005050862

RHEOLOGY OF DENSE GRANULAR FLOW

HALSEY, THOMAS C.; ERTAŞ, DENIZ; GREST, GARY S.; … - In: Advances in Complex Systems (ACS) 04 (2001) 04, pp. 419-428

We have performed numerical studies of dense granular flows on an incline with a rough bottom in two and three dimensions. This flow geometry produces a constant density profile that satisfies scaling relations of the Bagnold, rather than the viscous, kind. No surface-only flows were observed....

Persistent link: https://www.econbiz.de/10005050871