The accuracy of the discontinuous Galerkin method (DGM) for linear wave propagation problems in inhomogeneous media is investigated. Solutions to the linearized Euler equations (LEE) for one-dimensional wave propagation through a sound speed inhomogeneity, are computed with varying mean sound speed representation accuracy and compared to analytical solutions. A parameter study is performed to identify trends in the impact of the sound speed representation accuracy on the solution accuracy. The scattering of a plane wave by a mean, stationary vortex in two-dimensions is compared with semi-analytical solutions to visualize the effect of a mean flow representation accuracy on the near field acoustic solution. For the mapping of computational fluid dynamics (CFD) data to the acoustic mesh, a local moving least-squares procedure, permitting smoothing of unresolved flow features is outlined and verified. The local mapping procedure efficiently scales to large problem sizes.
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