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Simulating the fluxes at interfaces of membrane-electrolyte for vanadium crossover in vanadium redox flow battery

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Hi..
I am working on modelling of vanadium crossover in vfrb. I am using Nernst- Planck eqns and secondary current distribution to model membrane and tertiary current distribution to model electrolyte on the either side of the membrane. I am facing problem in modelling the boundaries of membrane-electrolyte interface. I am considering the interfacial area of finite thickness. And the thickness is assumed to be equivalent to the diffusion boundary layer that exist at the surface of a flow-by electrode . For simplicity membrane side thickness is assumed the same.
For this, in the nernst-planck eqn, concentration and migration terms are discretized as given in the attached image file. (Screenshot001.jpg)
Fluxes for both sides of electrolyte are- (Screenshot002.jpg)
I am not getting at all how to model this fluxes.. I am stuck here from quite a long time.. please help if any one finds it relevant.



0 Replies Last Post 21 avr. 2016, 06:02 UTC−4
COMSOL Moderator

Hello Swati Gupta

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