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arXiv 1504.08178math.NAcs.NAmath.AP
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基于Galerkin近似法的分数对流-扩散方程数值方法

Numerical method based on Galerkin approximation for the fractional advection-dispersion equation

Indian Institute of Technology, Banaras Hindu University(印度瓦拉纳西印度教大学理工学院)

Harendra Singh, Manas Ranjan Sahoo, Om Prakash Singh

AI总结:

本文提出基于Legendre缩放函数的Galerkin近似法,用于求解分数对流-扩散方程,通过求解分数常微分方程得到近似解,并证明该序列解构成弱渐近解。

摘要:

我们采用弱渐近解的概念来处理均质及非均质的分数对流扩散类型方程。利用Legendre缩放函数作为基函数,提出了一种基于Galerkin近似的数值方法。这导致了一组分数常微分方程,其解进一步给出分数阶对流-扩散方程的近似解。在某些近似解的假设下,证明该序列近似解构成弱渐近解。给出了数值例子以展示所提方法的有效性。

英文摘要:

We use a concept of weak asymptotic solution for homogeneous as well as non-homogeneous fractional advection dispersion type equations. Using Legendre scaling functions as basis, a numerical method based on Galerkin approximation is proposed. This leads to a system of fractional ordinary differential equations whose solutions in turn give approximate solution for the advection-dispersion equations of fractional order. Under certain assumptions on the approximate solutions, it is shown that this sequence of approximate solutions forms a weak asymptotic solution. Numerical examples are given to show the effectiveness of the proposed method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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