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Finite element formulation for compressible multiphase flows and its application to pyroclastic gravity currents [PDF]
Journal of Computational Physics, 2022 The numerical modeling of compressible multiphase flows is of high interest for several engineering applications. In this work, we focus on the study of pyroclastic flows arising from volcanic eruptive events.
Andrea Montanino +2 more
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Effects of pore pressure in pyroclastic flows: Numerical simulation and experimental validation
Geophysical Research Letters, 2017 Pyroclastic flows are mixtures of volcanic gases and particles that can be very hazardous owing to their fluid-like behavior. One possible mechanism to explain this behavior is the reduction of particles friction due to the internal gas pore pressure. To
Gueugneau Valentin +2 more
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Pyroclastic flows and surges over water: an example from the 1883 Krakatau eruption
Bulletin of Volcanology, 1996 Pyroclastic deposits from the 1883 eruption of Krakatau are described from areas northeast of the volcano on the islands of Sebesi, Sebuku, and Lagoendi, and the southeast coast of Sumatra.
H Sigurdsson, Carey S, Sigurdsson H
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Journal of Geophysical Research, 2007 A newly designed apparatus for experimental studies of pyroclastic flows consists of a cylindrical conduit that is filled with samples of natural volcanic products (tephra).
Pierfrancesco Dellino +2 more
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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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Fluidization in Pyroclastic Flow
1998Engineering Foundation ...
MARZOCCHELLA, ANTONIO +3 more
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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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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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