Single-Step Arbitrary Lagrangian–Eulerian Discontinuous Galerkin Method for 1-D Euler Equations
Jayesh Badwaik , Praveen Chandrashekar , Christian Klingenberg
Communications on Applied Mathematics and Computation ›› 2020, Vol. 2 ›› Issue (4) : 541 -579.
Single-Step Arbitrary Lagrangian–Eulerian Discontinuous Galerkin Method for 1-D Euler Equations
We propose an explicit, single-step discontinuous Galerkin method on moving grids using the arbitrary Lagrangian–Eulerian approach for one-dimensional Euler equations. The grid is moved with the local fluid velocity modified by some smoothing, which is found to considerably reduce the numerical dissipation introduced by Riemann solvers. The scheme preserves constant states for any mesh motion and we also study its positivity preservation property. Local grid refinement and coarsening are performed to maintain the mesh quality and avoid the appearance of very small or large cells. Second, higher order methods are developed and several test cases are provided to demonstrate the accuracy of the proposed scheme.
Airbus Foundation Chair on Mathematics of Complex Systems established in TIFR-CAM, Bangalore(none)
Deutsche Forschungsgemeinschaft (DE)(Priority Program 1648)
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