Abstract
Two alternating direction implicit difference schemes are derived for two-dimensional distributed-order fractional diffusion equations. It is proved that the schemes are unconditionally stable and convergent in a discrete \(L^1(L^\infty )\) norm with the convergence orders \(O(\tau ^2|\ln \tau |+h_1^2+h_2^2+\Delta \alpha ^2)\) and \(O(\tau ^2|\ln \tau |+h_1^4+h_2^4+\Delta \alpha ^4),\) respectively, where \( \tau , h_i \;(i=1,2)\) and \(\Delta \alpha \) are the step sizes in time, space and distributed order. Several numerical examples are given to confirm the theoretical results.
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The authors thank the anonymous referees for their valuable comments and suggestions to improve this work.
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The research is supported by the research Grants 11271068, 11401319, 11426137, 61304169 from National Natural Science Foundation of China, BK20130860 from Natural Science Youth Foundation of Jiangsu Province.
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Gao, Gh., Sun, Zz. Two Alternating Direction Implicit Difference Schemes for Two-Dimensional Distributed-Order Fractional Diffusion Equations. J Sci Comput 66, 1281–1312 (2016). https://doi.org/10.1007/s10915-015-0064-x
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DOI: https://doi.org/10.1007/s10915-015-0064-x