Abstract
The fractal mobile/immobile model bridges between Fickian fluxes at early times and non-Gaussian behavior at late times. In this work, an averaged L1 scheme for solving the fractal mobile/immobile Allen–Cahn equation with a Caputo temporal derivative of order \(\alpha \in (0,1)\) is developed and analyzed on graded meshes. The unique solvability and discrete energy stability are established rigorously on arbitrary nonuniform time meshes. Based on the spectral norm inequality, the unconditional stability and the second-order convergence analysis under the weakly regularity assumption are investigated on graded meshes. Finally, several numerical examples are presented to illustrate the theoretical analysis. To the best of our knowledge, this is the first topic on the convergence analysis for the fractal mobile/immobile Allen–Cahn equation on graded meshes.
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This work was supported by the Science Fund for Distinguished Young Scholars of Gansu Province (Grant No. 23JRRA1020) and NSFC 11601206.
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This work was supported by the Science Fund for Distinguished Young Scholars of Gansu Province (Grant No. 23JRRA1020) and NSFC 11601206.
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Yu, F., Chen, M. Second-Order Error Analysis for Fractal Mobile/Immobile Allen–Cahn Equation on Graded Meshes. J Sci Comput 96, 49 (2023). https://doi.org/10.1007/s10915-023-02276-5
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DOI: https://doi.org/10.1007/s10915-023-02276-5