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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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Temporal second-order difference methods for solving multi-term time fractional mixed diffusion and wave equations

TL;DR: This article deals with an establishment and sharp theoretical analysis of a numerical scheme devised for solving the multi-dimensional multi-term time fractional mixed diffusion and wave equations and develops L2-1σ formula, used to numerically solve the time distributed-order diffusion andWave equations.

A novel finite volume method for the Riesz space distributed-order advection–diffusion equation

TL;DR: In this article, the authors investigated the finite volume method (FVM) for a distributed-order space-fractional advection-diffusion (AD) equation and proved that the Crank-Nicolson scheme is unconditionally stable and convergent with second-order accuracy.
Journal ArticleDOI

A novel finite element method for the distributed-order time fractional Cable equation in two dimensions

TL;DR: The unstructured mesh Galerkin finite element method with a weighted and shifted Grunwald difference approximation and Composite Trapezoid formula is presented to solve the nonhomogeneous two-dimensional distributed order time fractional Cable equation on irregular convex domains.
Journal ArticleDOI

A fast temporal second-order compact ADI difference scheme for the 2D multi-term fractional wave equation

TL;DR: A fast temporal second-order compact ADI scheme is proposed for the 2D time multi-term fractional wave equation and the unconditional convergence and stability of the scheme in the discrete H 1 -norm are proved by the discrete energy method.
Journal ArticleDOI

A backward Euler difference scheme for the integro-differential equations with the multi-term kernels

TL;DR: A backward Euler difference scheme is formulated and analyzed for the integro-differential equations with the multi-term kernels and it is proved the stability and convergence based on the nonnegative character of the real quadratic form.
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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