Efficient numerical simulation of non-integer-order space-fractional reaction-diffusion equation via the Riemann-Liouville operator

被引:27
作者
Owolabi, Kolade M. [1 ,2 ]
机构
[1] Fed Univ Technol Akure, Dept Math Sci, PMB 704, Akure, Ondo State, Nigeria
[2] Univ Free State, Inst Groundwater Studies, Fac Nat & Agr Sci, ZA-9300 Bloemfontein, South Africa
来源
EUROPEAN PHYSICAL JOURNAL PLUS | 2018年 / 133卷 / 03期
关键词
PARTIAL-DIFFERENTIAL-EQUATIONS; DISPERSION EQUATIONS; APPROXIMATION; SCHEME;
D O I
10.1140/epjp/i2018-11951-x
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this work, we are concerned with the solution of non-integer space-fractional reaction-diffusion equations with the Riemann-Liouville space-fractional derivative in high dimensions. We approximate the Riemann-Liouville derivative with the Fourier transform method and advance the resulting system in time with any time-stepping solver. In the numerical experiments, we expect the travelling wave to arise from the given initial condition on the computational domain (-infinity,infinity), which we terminate in the numerical experiments with a large but truncated value of L. It is necessary to choose L large enough to allow the waves to have enough space to distribute. Experimental results in high dimensions on the space-fractional reaction-diffusion models with applications to biological models (Fisher and Allen-Cahn equations) are considered. Simulation results reveal that fractional reaction-diffusion equations can give rise to a range of physical phenomena when compared to non-integer-order cases. As a result, most meaningful and practical situations are found to be modelled with the concept of fractional calculus.
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页数:16
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