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An energy preserving finite difference scheme for the Poisson–Nernst–Planck system

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  • He, Dongdong
  • Pan, Kejia

Abstract

In this paper, we construct a semi-implicit finite difference method for the time dependent Poisson–Nernst–Planck system. Although the Poisson–Nernst–Planck system is a nonlinear system, the numerical method presented in this paper only needs to solve a linear system at each time step, which can be done very efficiently. The rigorous proof for the mass conservation and electric potential energy decay are shown. Moreover, mesh refinement analysis shows that the method is second order convergent in space and first order convergent in time. Finally we point out that our method can be easily extended to the case of multi-ions.

Suggested Citation

  • He, Dongdong & Pan, Kejia, 2016. "An energy preserving finite difference scheme for the Poisson–Nernst–Planck system," Applied Mathematics and Computation, Elsevier, vol. 287, pages 214-223.
    • Handle: RePEc:eee:apmaco:v:287-288:y:2016:i::p:214-223
    DOI: 10.1016/j.amc.2016.05.007
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