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arXiv 2006.04111math.NAcs.NAmath.AP
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二维Riesz空间分数阶对流-弥散方程的高阶数值方法

High-order numerical method for two-dimensional Riesz space fractional advection-dispersion equation

A. Borhanifar, M. A. Ragusa, S. Valizadehaz

摘要:

将分数阶中心差分法与交替方向隐式方法相结合,提出了求解二维Riesz空间分数阶对流-弥散方程的混合差分法.该方法在空间方向采用四阶中心差分算子,在时间方向采用二阶Crank-Nicolson方法。通过对该方法的一致性和稳定性的考察,证明了该方法的收敛性。几个数值例子被认为是旨在证明所提出的技术的有效性和适用性。

英文摘要:

In this paper, by combining of fractional centered difference approach with alternating direction implicit method, we introduce a mixed difference method for solving two-dimensional Riesz space fractional advection-dispersion equation. The proposed method is a fourth order centered difference operator in spatial directions and second order Crank-Nicolson method in temporal direction. By reviewing the consistency and stability of the method, the convergence of the proposed method is achieved. Several numerical examples are considered aiming to demonstrate the validity and applicability of the proposed technique.

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