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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 unified numerical scheme for the multi-term time fractional diffusion and diffusion-wave equations with variable coefficients

TL;DR: A unified numerical scheme based on finite difference method in time and Legendre spectral method in space is proposed, which converges at the convergence rate of O ( τ 2 + N 1 − m) , where τ, N, and m are the time-step size, polynomial degree, and regularity in the space variable of the exact solution, respectively.
Journal ArticleDOI

Weighted meshless spectral method for the solutions of multi-term time fractional advection-diffusion problems arising in heat and mass transfer

TL;DR: In this paper, a weighted meshless spectral radial point interpolation method (MSRPIM) is implemented for numerical solutions of a class of multi-term time fractional advection-diffusion problems with spatial and temporal dispersion.
Journal ArticleDOI

A linearized second-order scheme for nonlinear time fractional Klein-Gordon type equations

TL;DR: A linearized scheme is proposed to solve the problem of nonlinear time fractional Klein-Gordon type equations and it is shown that the method converges with second-order accuracy in time.
Journal ArticleDOI

Numerical solution of the fourth-order partial integro-differential equation with multi-term kernels by the Sinc-collocation method based on the double exponential transformation

TL;DR: A Sinc-collocation method for solving the fourth-order partial integro-differential equation with the multi-term kernels based on the double exponential (DE) transformation is considered and the convergence analysis of proposed method is obtained.
References
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Journal ArticleDOI

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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