Year: 2013
Journal of Computational Mathematics, Vol. 31 (2013), Iss. 5 : pp. 470–487
Abstract
In this work, two-grid characteristic finite volume schemes for the nonlinear parabolic problem are considered. In our algorithms, the diffusion term is discretized by the finite volume method, while the temporal differentiation and advection terms are treated by the characteristic scheme. Under some conditions about the coefficients and exact solution, optimal error estimates for the numerical solution are obtained. Furthermore, the two-grid characteristic finite volume methods involve solving a nonlinear equation on coarse mesh with mesh size $H$, a large linear problem for the Oseen two-grid characteristic finite volume method on a fine mesh with mesh size $h = O(H^2)$ or a large linear problem for the Newton two-grid characteristic finite volume method on a fine mesh with mesh size $h = O(|log h|^{1/2}H^3)$. These methods we studied provide the same convergence rate as that of the characteristic finite volume method, which involves solving one large nonlinear problem on a fine mesh with mesh size $h$. Some numerical results are presented to demonstrate the efficiency of the proposed methods.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/jcm.1304-m4288
Journal of Computational Mathematics, Vol. 31 (2013), Iss. 5 : pp. 470–487
Published online: 2013-01
AMS Subject Headings:
Copyright: COPYRIGHT: © Global Science Press
Pages: 18
Keywords: Two-grid Characteristic finite volume method Nonlinear parabolic problem Error estimate Numerical example.
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