Stabilizing Discontinuous Galerkin Methods Using Dafermos' Entropy Rate Criterion: II – Systems of Conservation Laws and Entropy Inequality Predictors

06/08/2023

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by   Simon-Christian Klein, et al.

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A novel approach for the stabilization of the Discontinuous Galerkin method based on the Dafermos entropy rate crition is presented. First, estimates for the maximal possible entropy dissipation rate of a weak solution are derived. Second, families of conservative Hilbert-Schmidt operators are identified to dissipate entropy. Steering these operators using the bounds on the entropy dissipation results in high-order accurate shock-capturing DG schemes for the Euler equations, satisfying the entropy rate criterion and an entropy inequality.