Exact solution of two-term time-fractional Thornley's problem by operational method

被引:13
作者
Bazhlekova, Emilia [1 ]
Dimovski, Ivan [1 ]
机构
[1] Bulgarian Acad Sci, Inst Math & Informat, BU-1113 Sofia, Bulgaria
关键词
time-fractional diffusion equation; Caputo fractional derivative; non-local BVP; Mittag-Leffler function; operational calculus; non-classical convolution; BOUNDARY-VALUE-PROBLEMS; DIFFUSION EQUATION; DIFFERENTIAL-EQUATIONS; TELEGRAPH EQUATION; EXPLICIT SOLUTION; TERM; OPERATORS;
D O I
10.1080/10652469.2013.815184
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
A two-term time-fractional diffusion equation is studied, subject to a non-local boundary condition. The fractional time derivatives are described in the Caputo sense. We develop a bivariate operational calculus for this problem and apply it to obtain a Duhamel-type representation of the solution. This is a compact representation, containing two convolution products of special solutions and the arbitrary initial and boundary functions. With respect to the space variable a non-classical convolution is used. To find the special solutions, appropriate spectral projection operators are applied. In this way, the solution is constructed in the form of a series expansion on the generalized eigenfunctions of a non-selfadjoint Sturm-Liouville problem and three-parameter Mittag-Leffler functions. Thanks to the uniqueness property of the employed spectral expansion, the uniqueness of the solution is also proven.
引用
收藏
页码:61 / 74
页数:14
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