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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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A fast implicit difference scheme for a new class of time distributed-order and space fractional diffusion equations with variable coefficients

TL;DR: In this paper, a new class of time distributed-order and space fractional diffusion equations with variable coefficients on bounded domains and Dirichlet boundary conditions is considered, and a new implicit difference scheme for the multiterm time-space diffusion equations is proposed along with a discussion about the unconditional stability and convergence.
Journal ArticleDOI

Optimal Collocation Nodes for Fractional Derivative Operators

TL;DR: Spectral discretizations of fractional derivative operators are examined, where the approximation basis is related to the set of Jacobi polynomials, and the pseudospectral method is implemented, which opens the way to the analysis of alternative techniques and the search for optimal distributions of collocation nodes.
Journal ArticleDOI

Simultaneous inversion for the diffusion and source coefficients in the multi-term TFDE

TL;DR: In this paper, the space-dependent diffusion coefficient and the source coefficient simultaneously in the multi-term time fractional diffusion equation (TFDE) were determined using measurements at one inner point.
Journal ArticleDOI

A fast numerical method for two-dimensional Riesz space fractional diffusion equations on a convex bounded region

TL;DR: In this article, a two-dimensional Riesz space fractional diffusion equation on a convex bounded region (2D-RSFDE-CBR) is considered.
Journal ArticleDOI

New collocation scheme for solving fractional partial differential equations

TL;DR: In this article, the authors used shifted Chebyshev-Gauss-Lobatto (CGL) collocation points in conjunction with an operational matrix of Caputo sense derivatives via Genocchi polynomials.
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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