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Numerical methods for solving the multi-term time-fractional wave-diffusion equation

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TLDR
Some computationally effective numerical methods are proposed for simulating the multi-term time-fractional wave-diffusion equations and can be extended to other kinds of themulti-term fractional time-space models with fractional Laplacian.
Abstract
In this paper, the multi-term time-fractional wave-diffusion equations are considered. The multi-term time fractional derivatives are defined in the Caputo sense, whose orders belong to the intervals [0,1], [1,2), [0,2), [0,3), [2,3) and [2,4), respectively. Some computationally effective numerical methods are proposed for simulating the multi-term time-fractional wave-diffusion equations. The numerical results demonstrate the effectiveness of theoretical analysis. These methods and techniques can also be extended to other kinds of the multi-term fractional time-space models with fractional Laplacian.

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Citations
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Journal ArticleDOI

Mixed finite element algorithm for a nonlinear time fractional wave model

TL;DR: A fully discrete mixed element algorithm is formulated, where the temporal direction is approximated by a second-order scheme and the stability analysis of the proposed mixed scheme is done and optimal error estimates for three functions are derived.
Journal ArticleDOI

A bounded and efficient scheme for multidimensional problems with anomalous convection and diffusion

TL;DR: It is shown in this work that the method is capable of preserving some of the constant solutions of the continuous model, and it is proved that the technique is a second-order consistent, stable and quadratically convergent scheme.
Journal ArticleDOI

Controllability of multi-term time-fractional differential systems with state-dependent delay

TL;DR: In this paper, controllability results for a class of multi-term time-fractional differential systems with state-dependent delay have been studied and the concept of fractional calculus, measure of noncompactness and Mönch fixed-point theorem has been implemented to obtain a new set of controLLability results.
Journal ArticleDOI

Monotonicity, concavity, and convexity of fractional derivative of functions.

TL;DR: The monotonicity of the solutions of a class of nonlinear fractional differential equations is studied, and the existing results were extended, and corresponding criteria are derived.
Journal ArticleDOI

A Compact Difference Scheme for Fourth-Order Temporal Multi-Term Fractional Wave Equations and Maximum Error Estimates

TL;DR: In this paper, a spatial compact difference scheme for a class of fourth-order temporal multi-term fractional wave equations is developed and the original problem is reduced to a lower order system and the corresponding time fractional derivatives are approximated by the L1-formula.
References
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The random walk's guide to anomalous diffusion: a fractional dynamics approach

TL;DR: Fractional kinetic equations of the diffusion, diffusion-advection, and Fokker-Planck type are presented as a useful approach for the description of transport dynamics in complex systems which are governed by anomalous diffusion and non-exponential relaxation patterns.
Journal ArticleDOI

Analysis of Fractional Differential Equations

TL;DR: In this paper, the authors discuss existence, uniqueness, and structural stability of solutions of nonlinear differential equations of fractional order, and investigate the dependence of the solution on the order of the differential equation and on the initial condition.
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