Abstract
An accurate solution of the wave equation at an acousticelastic interface is important for full wavefield imaging and inversion in marine exploration. The solution requires careful implementation for the acoustic-elastic boundary conditions. In this work, we leverage a nodal discontinuous Galerkin (NDG) method, in which the unstructured uniform triangular meshes are used for the model meshing and an explicit upwind numerical flux derived from Riemann problem is adopted to handle the boundary conditions at the acoustic-elastic interface. The numerical results demonstrate that the proposed NDG method is effective and accurate for dealing with the coupled acoustic-elastic media.
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