A Local Discontinuous Galerkin approximation for the p-Navier-Stokes system, Part I: Convergence analysis

08/08/2022

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by   Alex Kaltenbach, et al.

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In the present paper, we propose a Local Discontinuous Galerkin (LDG) approximation for fully non-homogeneous systems of p-Navier-Stokes type. On the basis of the primal formulation, we prove well-posedness, stability (a priori estimates), and weak convergence of the method. To this end, we propose a new DG discretization of the convective term and develop an abstract non-conforming theory of pseudo-monotonicity, which is applied to our problem. We also use our approach to treat the p-Stokes problem.