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Analysis of Hexagonal Grid Finite Difference Methods for Anisotropic Laplacian Related Equations

Published online by Cambridge University Press:  20 June 2017

Daniel Lee*
Affiliation:
Department of Applied Mathematics, Tunghai University, Taichung 40704, Taiwan, Republic of China
*
*Corresponding author. Email address:danlee@thu.edu.tw (D. Lee)
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Abstract

Hexagonal grids are valuable in two-dimensional applications involving Laplacian. The methods and analysis are investigated in current work in both linear and nonlinear problems related to anisotropic Laplacian. Ordinary and compact hexagonal grid finite difference methods are developed by elementary arguments, and then analyzed by perturbation for standard Laplacian. In the anisotropic case, analysis is done through reduction to the standard one by using Fourier vectors of mixed types. These hexagonal seven-point methods, with established theoretic stabilities and accuracies, are numerically confirmed in linear and semi-linear anisotropic Poisson problems, and can be applied also in time-dependent problems and in many applications in two-dimensional irregular domains.

Type
Research Article
Copyright
Copyright © Global-Science Press 2017 

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