Invariant domain preserving high-order spectral discontinuous approximations of hyperbolic systems

Florent Renac; Valentin Carlier

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arXiv · 2203.05452

Invariant domain preserving high-order spectral discontinuous approximations of hyperbolic systems

Florent Renac·Valentin Carlier

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Abstract

We propose a limiting procedure to preserve invariant domains with time explicit discrete high-order spectral discontinuous approximate solutions to hyperbolic systems of conservation laws. Provided the scheme is discretely conservative and satisfy geometric conservation laws at the discrete level, we derive a condition on the time step to guaranty that the cell-averaged approximate solution is a convex combination of states in the invariant domain. These states are then used to define local bounds which are then imposed to the full high-order approximate solution within the cell via an a posteriori scaling limiter. Numerical experiments are then presented with modal and nodal discontinuous Galerkin schemes confirm the robustness and stability enhancement of the present approach.

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Florent Renac, Valentin Carlier. 2022-03-12. Invariant domain preserving high-order spectral discontinuous approximations of hyperbolic systems. https://arxiv.org/abs/2203.05452

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