abstract
Many electrochemical experiments are performed in non-agitated or in non-controlled flow conditions. When such measurements are modelled considering convection, diffusion, migration and reactions, the problem of describing a suitable velocity field arises immediately. Based on the work of Amatore (2001), we present a workable approach that avoids solving the velocity fields in multi-ion modelling. The convection is treated as a diffusion term that becomes dominant from a certain distance from the wall (electrode). This implies that mass transfer becomes irrelevant from that distance on and that there is a fluent transition from the diffusion layer to the bulk of the solution. The theory is elaborated and two examples clearly show the applicability. (C) 2013 Elsevier B.V. All rights reserved.
keywords
NATURAL-CONVECTION; CONCENTRATION PROFILES; TRANSPORT; ELECTRODES; SIMULATION; MASS
subject category
Electrochemistry
authors
Dolgikh, O; Demeter, AS; Bastos, AC; Topa, V; Deconinck, J
our authors
António Alexandre Cunha Bastos
Assistant Researcheracknowledgements
This work was supported by contract No. POSDRU/107/1.5/S/78534, project co-founded by the European Social Fund through the Sectorial Operational Program Human Resources 2007-2013, by CNCSIS-UEFISCSU under IDEI research program with grant number ID2538/2008, by FP7 Marie Curie IRSES project SISET, FP7-PEOPLE-IRSES-GA-2010-269282 and cotutelle agreement VUB-TUCN of 23/09/2010.