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Determine Rate of Species Consumption in Electrode
Posted Jul 24, 2018, 5:46 a.m. EDT Battery Design Version 5.2 1 Reply
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Hi I am new to COMSOL and am using version 5.2. I am using the free and porous media flow and a transport of diluted species equations to solve my model. I want to know how to calculate the rate at which the species is being consumed in the electrode. If I try to use a time dependent study the flow field is successfully calculated as a function of time but the chemical species only stays at the intial condition.
Edit: I think I am supposed to do a volume integration over the electrode and it will tell me the mol/s being comsumed.
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According to the Faraday law the rate of consumption = nu·I/nF where nu is the stoichiometric coefficient of the reaction, I electric current, n # of electrons and F the Faraday constant. Another way is to calculate the flux of the reacting species perpendicular to the electrode and integrate it over the electrode. The latter may be better if there are parasitic electrode reactions that consume a portion of current.