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Convergence of a Mimetic Finite Difference Method for Static Diffusion Equation

Abstract

The numerical solution of partial differential equations with finite differences mimetic methods that satisfy properties of the continuum differential operators and mimic discrete versions of appropriate integral identities is more likely to produce better approximations. Recently, one of the authors developed a systematic approach to obtain mimetic finite difference discretizations for divergence and gradient operators, which achieves the same order of accuracy on the boundary and inner grid points. This paper uses the second-order version of those operators to develop a new mimetic finite difference method for the steady-state diffusion equation. A complete theoretical and numerical analysis of this new method is presented, including an original and nonstandard proof of the quadratic convergence rate of this new method. The numerical results agree in all cases with our theoretical analysis, providing strong evidence that the new method is a better choice than the standard finite difference method.

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Correspondence to J. M. Guevara-Jordan.

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Guevara-Jordan, J.M., Rojas, S., Freites-Villegas, M. et al. Convergence of a Mimetic Finite Difference Method for Static Diffusion Equation. Adv Differ Equ 2007, 012303 (2007). https://doi.org/10.1155/2007/12303

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  • DOI: https://doi.org/10.1155/2007/12303

Keywords

  • Diffusion Equation
  • Discrete Version
  • Finite Difference Method
  • Static Diffusion
  • Integral Identity