Detecting, Modelling and Responding to Effusive Eruptions
CONTAINS OPEN ACCESS
For effusive volcanoes in resource-poor regions, there is a pressing need for a crisis response-chain bridging the global scientific community to allow provision of standard products for timely humanitarian response. As a first step in attaining this need, this Special Publication provides a complete directory of current operational capabilities for monitoring effusive eruptions. This volume also reviews the state-of-the-art in terms of satellite-based volcano hot-spot tracking and lava-flow simulation. These capabilities are demonstrated using case studies taken from well-known effusive events that have occurred worldwide over the last two decades at volcanoes such as Piton de la Fournaise, Etna, Stromboli and Kilauea. We also provide case-type response models implemented at the same volcanoes, as well as the results of a community-wide drill used to test a fully-integrated response focused on an operational hazard-GIS. Finally, the objectives and recommendations of the ‘Risk Evaluation, Detection and Simulation during Effusive Eruption Disasters’ working group are laid out in a statement of community needs by its members.
GPUSPH: a Smoothed Particle Hydrodynamics model for the thermal and rheological evolution of lava flows
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Published:January 01, 2016
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CiteCitation
Giuseppe Bilotta, Alexis Hérault, Annalisa Cappello, Gaetana Ganci, Ciro Del Negro, 2016. "GPUSPH: a Smoothed Particle Hydrodynamics model for the thermal and rheological evolution of lava flows", Detecting, Modelling and Responding to Effusive Eruptions, A. J. L. Harris, T. De Groeve, F. Garel, S. A. Carn
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Abstract
GPUSPH is a fully three-dimensional model for the simulation of the thermal and rheological evolution of lava flows that relies on the Smoothed Particle Hydrodynamics (SPH) numerical method. Thanks to the Lagrangian, meshless nature of SPH, the model incorporates a more complete physical description of the emplacement process and rheology of lava that considers the free surface, the irregular boundaries represented by the topography, the solidification fronts and the non-Newtonian rheology with temperature-dependent parameters. GPUSPH follows the very general Herschel–Bulkley rheological model, which encompasses Newtonian, power-law and Bingham flow behaviours, with both constant and temperature-dependent parameters, and can thus be used to explore in detail the impact of rheology on the behaviour of lava flows and on their emplacement. To illustrate this possibility, we present some preliminary applications of the model for studying the rheology of lava flows with different constitutive relationships and thermal regimes using the real topography of the Mt Etna volcano.
- applications
- boundary conditions
- compressibility
- digital terrain models
- dynamics
- emplacement
- equations
- equations of state
- Europe
- fluid dynamics
- fluid flow
- Italy
- kinematics
- lava
- lava flows
- mass
- mathematical methods
- models
- Mount Etna
- numerical analysis
- particles
- phase equilibria
- processes
- properties
- rheology
- Sicily Italy
- simulation
- Southern Europe
- temperature
- thermal history
- thermal regime
- three-dimensional models
- topography
- velocity
- viscosity
- volcanism
- volcanoes
- smoothed particle hydrodynamics
- GPUSPH