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Flow and deposition mechanisms of debris avalanches and pyroclastic flows
Flow and deposition mechanisms of debris avalanches and pyroclastic flowsopenaire +1 more source
On pyroclastic flow emplacement
Journal of Geophysical Research: Solid Earth, 1993 In this note I investigate some theoretical characteristics of pyroclastic flow deposits, assuming that these flows are Bingham fluids, probably the simplest non‐Newtonian fluids. Pyroclastic flows are modeled as laminar debris flows moving on an inclined plane, and their physics is discussed within the classical framework of lubrication theory.
BATTAGLIA, MAURIZIO, Maurizio Battaglia
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Nature, 1977
THE mobility of pyroclastic flows has been described as spectacular1, in particular because of their ability to surmount obstacles in their path. It is relatively easy to estimate the minimum velocities required to climb a given height, if frictional losses are ignored.
P W Francis
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THE mobility of pyroclastic flows has been described as spectacular1, in particular because of their ability to surmount obstacles in their path. It is relatively easy to estimate the minimum velocities required to climb a given height, if frictional losses are ignored.
P W Francis
exaly +2 more sources
Relation Between Dry Granular Flow Regimes and Morphology of Deposits: Formation of Levées in Pyroclastic Deposits [PDF]
Earth and Planetary Science Letters, 2004 Experiments on dry granular matter flowing down an inclined plane are performed in order to study the dynamics of dense pyroclastic flows. The plane is rough, and always wider than the flow, focusing this study on the case of laterally unconfined (free ...
Nathalie Thomas
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Models for pyroclastic surges and pyroclastic flows
Journal of Volcanology and Geothermal Research, 1979Pyroclastic surges are low-concentration turbulent flows that form in at least three ways: (1) eruption column collapse (ground surge, base surge), (2) elutriation from the top of a moving pyroclastic flow (ash cloud), and (3) directly from a crater without an accompanying vertical eruption column.∗ Ground surge deposits occur at the base and ash cloud
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Pyroclastic flows modelling using cellular automata
Computers & Geosciences, 2006Cellular automata (CA) and derived computational paradigms represent an alternative approach to differential equations to model and simulating complex fluid dynamical systems, whose evolution depends on the local interactions of their constituent parts.
AVOLIO M. V +5 more
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1984
Pyroclastic flows are volcanically produced hot, gaseous, particulate density currents. Their deposits offer unparalleled opportunities to estimate minimum volumes of near-surface magma chambers as well as vertical chemical, mineralogical, and thus temperature and pressure distributions within the magma columns immediately prior to eruption.
Richard V. Fisher, Hans-Ulrich Schmincke
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Pyroclastic flows are volcanically produced hot, gaseous, particulate density currents. Their deposits offer unparalleled opportunities to estimate minimum volumes of near-surface magma chambers as well as vertical chemical, mineralogical, and thus temperature and pressure distributions within the magma columns immediately prior to eruption.
Richard V. Fisher, Hans-Ulrich Schmincke
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CLASSIFICATION OF PYROCLASTIC FLOWS
International Geology Review, 1961Pyroclastic flow is defined as the flow of high-temperature, essential, fragmental materials. This is synonymous with the nuee ardente in the broad sense. Three modes of emplacement of high-temperature, essential, solid (or liquid) materials after the ejection from the crater may be recognized: 1) Projection of fragments from the crater by explosive ...
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Fluidization in Pyroclastic Flow
1998Engineering Foundation ...
MARZOCCHELLA, ANTONIO +3 more
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High performance computing simulations of pyroclastic flows
Computer Physics Communications, 2005Explosive volcanic eruptions are certainly one of the most complex phenomena occurring in nature. In addition, the occurrence of pyroclastic flows, i.e. of high-velocity and high-temperature ground-hugging flows produced by the collapse of volcanic column, represent a very hazardous phenomenon for the nearby urbanized areas.
Carlo Cavazzoni +4 more
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