A Discontinuous Galerkin method for Shock Capturing using a mixed high-order and sub-grid low-order approximation space

11/04/2019

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by   Per-Olof Persson, et al.

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This article considers a new discretization scheme for conservation laws. The discretization setting is based on a discontinuous Galerkin scheme in combination with an approximation space that contains high-order polynomial modes as well as piece-wise constant modes on a sub-grid. The high-order modes can continuously be suppressed with a penalty function that is based on a sensor which is intertwined with the approximation space. Numerical tests finally illustrate the performance of this scheme.