Comparison and numerical treatment of generalised Nernst-Planck models
dc.bibliographicCitation.seriesTitle | WIAS Preprints | eng |
dc.bibliographicCitation.volume | 1940 | |
dc.contributor.author | Fuhrmann, Jürgen | |
dc.date.accessioned | 2016-03-24T17:37:08Z | |
dc.date.available | 2019-06-28T08:13:56Z | |
dc.date.issued | 2014 | |
dc.description.abstract | In its most widespread, classical formulation, the Nernst-Planck-Poisson system for ion transport in electrolytes fails to take into account finite ion sizes. As a consequence, it predicts unphysically high ion concentrations near electrode surfaces. Historical and recent approaches to an approriate modification of the model are able to fix this problem. Several appropriate formulations are compared in this paper. The resulting equations are reformulated using absolute activities as basic variables describing the species amounts. This reformulation allows to introduce a straightforward generalisation of the Scharfetter-Gummel finite volume discretization scheme for drift-diffusion equations. It is shown that it is thermodynamically consistent in the sense that the solution of the corresponding discretized generalized Poisson-Boltzmann system describing the thermodynamical equilibrium is a stationary state of the discretized time-dependent generalized Nerns-Planck system. Numerical examples demonstrate the improved physical correctness of the generalised models and the feasibility of the numerical approach. | eng |
dc.description.version | publishedVersion | eng |
dc.format | application/pdf | |
dc.identifier.issn | 2198-5855 | |
dc.identifier.uri | https://doi.org/10.34657/2128 | |
dc.identifier.uri | https://oa.tib.eu/renate/handle/123456789/2952 | |
dc.language.iso | eng | eng |
dc.publisher | Berlin : Weierstraß-Institut für Angewandte Analysis und Stochastik | eng |
dc.relation.issn | 0946-8633 | eng |
dc.rights.license | This document may be downloaded, read, stored and printed for your own use within the limits of § 53 UrhG but it may not be distributed via the internet or passed on to external parties. | eng |
dc.rights.license | Dieses Dokument darf im Rahmen von § 53 UrhG zum eigenen Gebrauch kostenfrei heruntergeladen, gelesen, gespeichert und ausgedruckt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. | ger |
dc.subject | Electrolytes | eng |
dc.subject | Nernst-Planck equations | eng |
dc.subject | Bikermann-Freise Model | eng |
dc.subject | finite volume methods | eng |
dc.subject.ddc | 510 | eng |
dc.title | Comparison and numerical treatment of generalised Nernst-Planck models | eng |
dc.type | report | eng |
dc.type | Text | eng |
tib.accessRights | openAccess | eng |
wgl.contributor | WIAS | eng |
wgl.subject | Mathematik | eng |
wgl.type | Report / Forschungsbericht / Arbeitspapier | eng |
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