Spectral analysis and multigrid methods for finite volume approximations of space-fractional diffusion equations

M Donatelli, M Mazza, S Serra-Capizzano - SIAM Journal on Scientific …, 2018 - SIAM
We consider a boundary value problem in weak form of a steady-state Riesz space-
fractional diffusion equation (FDE) of order 2-α with 0<α<1. By using a finite volume …

Nonuniform difference schemes for multi-term and distributed-order fractional parabolic equations with fractional Laplacian

M Fardi, MA Zaky, AS Hendy - Mathematics and Computers in Simulation, 2023 - Elsevier
In this paper, the multi-term temporal fractional order and temporal distributed-order
parabolic equations with fractional Laplacian are numerically investigated. Several …

On τ-preconditioner for a novel fourth-order difference scheme of two-dimensional Riesz space-fractional diffusion equations

YY Huang, W Qu, SL Lei - Computers & Mathematics with Applications, 2023 - Elsevier
In this paper, a τ-preconditioner for a novel fourth-order finite difference scheme of two-
dimensional Riesz space-fractional diffusion equations (2D RSFDEs) is considered, in …

[HTML][HTML] A rational preconditioner for multi-dimensional Riesz fractional diffusion equations

L Aceto, M Mazza - Computers & Mathematics with Applications, 2023 - Elsevier
We propose a rational preconditioner for an efficient numerical solution of linear systems
arising from the discretization of multi-dimensional Riesz fractional diffusion equations. In …

Simulation of nonlinear fractional dynamics arising in the modeling of cognitive decision making using a new fractional neural network

AH Hadian Rasanan, N Bajalan… - … Methods in the …, 2020 - Wiley Online Library
By the rapid growth of available data, providing data‐driven solutions for nonlinear
(fractional) dynamical systems becomes more important than before. In this paper, a new …

A novel physics-based preconditioner for nodal integral method using JFNK for 2D Burgers equation

N Kumar, S Singh - Progress in Nuclear Energy, 2021 - Elsevier
Abstract Nodal Integral Methods (NIM) are prevalent for solving neutron transport equations.
Due to the success of this method for solving neutron transport problems, the method was …

A new FV scheme and fast cell-centered multigrid solver for 3D anisotropic diffusion equations with discontinuous coefficients

K Pan, X Wu, H Hu, Y Yu, Z Li - Journal of Computational Physics, 2022 - Elsevier
In this paper, an efficient cell-centered extrapolation cascadic multigrid (CEXCMG) method
is proposed for solving large linear system of equations resulting from finite volume (FV) …

A spatial fourth-order maximum principle preserving operator splitting scheme for the multi-dimensional fractional Allen-Cahn equation

D He, K Pan, H Hu - Applied Numerical Mathematics, 2020 - Elsevier
In this paper, we consider the numerical study for the multi-dimensional fractional-in-space
Allen-Cahn equation with homogeneous Dirichlet boundary condition. By utilizing Strang's …

Preconditioners for fractional diffusion equations based on the spectral symbol

N Barakitis, SE Ekström… - Numerical Linear Algebra …, 2022 - Wiley Online Library
It is well known that the discretization of fractional diffusion equations with fractional
derivatives α∈(1, 2) α ∈\left (1, 2\right), using the so‐called weighted and shifted Grünwald …

Multigrid preconditioners for anisotropic space-fractional diffusion equations

M Donatelli, R Krause, M Mazza, K Trotti - Advances in Computational …, 2020 - Springer
We focus on a two-dimensional time-space diffusion equation with fractional derivatives in
space. The use of Crank-Nicolson in time and finite differences in space leads to dense …