First error bounds for the porous media approximation of the Poisson‐Nernst‐Planck equations
First error bounds for the porous media approximation of the Poisson‐Nernst‐Planck equations
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Poisson-Nernst-Planck 方程的多孔介质近似的第一误差界
DOI:
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发表时间:
2012
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通讯作者:
M. Schmuck
中科院分区:
文献类型:
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作者:
M. Schmuck
We study the well‐accepted Poisson‐Nernst‐Planck equations modeling transport of charged particles. By formal multiscale expansions we rederive the porous media formulation obtained by two‐scale convergence in [42, 43]. The main result is the derivation of the error which occurs after replacing a highly heterogeneous solid‐electrolyte composite by a homogeneous one. The derived estimates show that the approximation errors for both, the ion densities quantified in L2‐norm and the electric potential measured in H1‐norm, are of order O(s1/2).