
doi: 10.3934/cam.2024002
<abstract><p>In this article, a second-order time discrete algorithm with a shifted parameter $ \theta $ combined with a fast time two-mesh (TT-M) mixed finite element (MFE) scheme was considered to look for the numerical solution of the nonlinear fractional hyperbolic wave model. The second-order backward difference formula including a shifted parameter $ \theta $ (BDF2-$ \theta $) with the weighted and shifted Grünwald difference (WSGD) approximation for fractional derivative was used to discretize time direction at time $ t_{n-\theta} $, the $ H^1 $-Galerkin MFE method was applied to approximate the spatial direction, and the fast TT-M method was used to save computing time of the developed MFE system. A priori error estimates for the fully discrete TT-M MFE system were analyzed and proved in detail, where the second-order space-time convergence rate in both $ L^2 $-norm and $ H^1 $-norm were derived. Detailed numerical algorithms with smooth and weakly regular solutions were provided. Finally, some numerical examples were provided to illustrate the feasibility and effectiveness for our scheme.</p></abstract>
Error bounds for initial value and initial-boundary value problems involving PDEs, time two-mesh mixed finite element method, WSGD operator, error estimates, QA801-939, Analytic mechanics, Finite element, Rayleigh-Ritz and Galerkin methods for initial value and initial-boundary value problems involving PDEs, fractional hyperbolic wave model, Stability and convergence of numerical methods for initial value and initial-boundary value problems involving PDEs, wsgd operator, Fractional partial differential equations
Error bounds for initial value and initial-boundary value problems involving PDEs, time two-mesh mixed finite element method, WSGD operator, error estimates, QA801-939, Analytic mechanics, Finite element, Rayleigh-Ritz and Galerkin methods for initial value and initial-boundary value problems involving PDEs, fractional hyperbolic wave model, Stability and convergence of numerical methods for initial value and initial-boundary value problems involving PDEs, wsgd operator, Fractional partial differential equations
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