Simulations of the 2004 lava flow at Etna volcano using the magflow cellular automata model |
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Authors: | Ciro Del Negro Luigi Fortuna Alexis Herault Annamaria Vicari |
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Institution: | (1) Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Piazza Roma, 2, 95123 Catania, Italy;(2) Dipartimento di Ingegneria Elettrica Elettronica e dei Sistemi, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy;(3) Laboratoire de Science de Information, Université de Marne La Vallée, Paris XIII, Champs sur Marne, Marne-la-Vallée Cedex 2, 77454, France |
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Abstract: | Since the mechanical properties of lava change over time, lava flows represent a challenge for physically based modeling.
This change is ruled by a temperature field which needs to be modeled. MAGFLOW Cellular Automata (CA) model was developed
for physically based simulations of lava flows in near real-time. We introduced an algorithm based on the Monte Carlo approach
to solve the anisotropic problem. As transition rule of CA, a steady-state solution of Navier-Stokes equations was adopted
in the case of isothermal laminar pressure-driven Bingham fluid. For the cooling mechanism, we consider only the radiative
heat loss from the surface of the flow and the change of the temperature due to mixture of lavas between cells with different
temperatures. The model was applied to reproduce a real lava flow that occurred during the 2004–2005 Etna eruption. The simulations
were computed using three different empirical relationships between viscosity and temperature. |
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Keywords: | Mount Etna Lava flow Simulation Cellular automata |
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