|Title:||A discontinuous Galerkin time integration scheme for second order differential equations with applications to seismic wave propagation problems|
|Date:||Monday 25th January 2021|
|Author(s) :||Antonietti, P.f.; Mazzieri, I.; Migliorini, F.|
|Abstract:|| In this work, we present a new high order Discontinuous Galerkin time integration scheme for second-order (in time) differential systems that typically arise from the space discretization of the elastodynamics equation.
By rewriting the original equation as a system of first order differential equations we introduce the method and show that the resulting discrete formulation is well-posed, stable and retains super-optimal rate of convergence with respect to the discretization parameters, namely the time step and the polynomial approximation degree. A set of two- and three-dimensional numerical experiments confirm the theoretical bounds. Finally, the method is applied to real geophysical applications.|
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Sottomesso a Journal of Computational Physics