Â Challenging geophysical applications require a flexible representation of the geometry and an accurate approximation of the solution field. Paradigmatic examples include seismic wave propagation phenomena and fractured reservoir simulations. The main challenges are i) the complexity of the physical domain, due to the presence of localized geological irregularities, alluvial basins, faults and fractures; ii) the heterogeneities in the medium, with significant and sharp contrasts; and iii) the coexistence of different physical models. The highorder discontinuous Galerkin (DG) Finite Element Method possesses the builtin flexibility to naturally accommodate both nonmatching meshes, possibly made of polygonal and polyhedral elements, and highorder approximations in any space dimension. At the same time DG methods feature a highlevel of intrinsic parallelism, making them well suited for largescale computations on massively parallel architectures. In this talk, I will discuss recent advances in the development and analysis of highorder DG methods for the numerical approximation of seismic wave propagation phenomena. I will analyse the stability and the theoretical properties of the scheme and present some simulations of the earthquake ground motion induced by real largescale seismic events. Further applications to flow in fractured porous media and fluidstructure interaction problems will also be briefly discussed.
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Numerical modeling of earthquake ground motion
Research Group:
Paola F. Antonietti
Institution:
Polimi
Location:
A005
Schedule:
Monday, November 18, 2019  14:00
Abstract:
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