A modified equation approach to constructing fourth order methods for acoustic wave propagation
SIAM Journal on Scientific and Statistical Computing
SIAM Journal on Numerical Analysis
Higher Order Triangular Finite Elements with Mass Lumping for the Wave Equation
SIAM Journal on Numerical Analysis
Nodal high-order methods on unstructured grids
Journal of Computational Physics
Mixed Spectral Finite Elements for the Linear Elasticity System in Unbounded Domains
SIAM Journal on Scientific Computing
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We investigate explicit higher order time discretizations of linear second order hyperbolic problems. We study the even order (2m) schemes obtained by the modified equation method. We show that the corresponding CFL upper bound for the time step remains bounded when the order of the scheme increases. We propose variants of these schemes constructed to optimize the CFL condition. The corresponding optimization problem is analyzed in detail. The optimal schemes are validated through various numerical results.