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Bisconti, L.
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Bisconti, L.
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- PublicationOpen AccessA numerical code for the simulation of magma-rocks dynamics(2009)
; ; ; ; ; ; ; ;Longo, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Barsanti, M.; Dipartimento di Matematica Applicata "U. Dini", Università degli Studi di Pisa, Pisa, Italy ;Papale, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Vassalli, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Montagna, C. P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Bisconti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Saccorotti, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia; ; ; ; ; ; We present a numerical code for the simulation of the dynamics of compressible to incompressible, multicomponent ows, based on the _nite element algorithm by Hauke & Hughes (1998). Balance equations for mass, momentum, energy and composition are solved with space-time Galerkin least-squares and discontinuity-capturing stabilizing techniques. The code is used to study the dynamics of convection and mixing in magmatic systems such as replenishment of magma chambers and volcanic conduits, and it reveals the occurrence of previously not described processes. The uid-structure interaction of fully coupled magma-rock dynamics is being implemented by using the deforming-spatial domain method by Tezduyar (2006), that intrinsecally includes moving meshes.513 170 - PublicationRestrictedAn integrated method to model volcanic processes and associated geophysical signals(2009)
; ; ; ; ; ; ; ; ;Vassalli, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Longo, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Montagna, C. P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;O'Brien, G. S.; School of Geological Sciences, University College Dublin, Belfield, Dublin 4, Ireland ;Bean, C. J.; School of Geological Sciences, University College Dublin, Belfield, Dublin 4, Ireland ;Bisconti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Papale, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia ;Saccorotti, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italia; ; ; ; ; ; ; We present a numerical approach for modelling the complex sub-surface volcanic processes and associated geophysical signals. This method is based on the one-way coupling of the dynamics of a magmatic system and the response of the host rocks. The two systems are modelled independently, by two different numerical codes, that solve the equations of motion for the magmatic fluid and the equation of elasto-dynamics for wave propagation in the surrounding medium, respectively. Synthetic geophysical signals can be obtained and compared with those recorded by monitoring networks. The final aim is to understand how the complex physics of magma dynamics, coupled to its hosting medium, translates into geophysical data that can be measured and interpreted in order to understand sub-surface magma dynamics and forecast the short-term volcanic hazard. We applied this method to the Campi Flegrei volcanic system (southern Italy) and investigated the convection and mixing dynamics induced by the arrival of new CO2-rich magma into a hypothetical shallow magma chamber. The pressure waves originated by this system are propagated in the surrounding rocks, and the associated broad-band ground displacement and gravity anomalies are evaluated at the Earth’s surface.266 64