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How to define a PDE form of a source term including an unknown variable in advection-diffusion equation of chemical species in COMSOL

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Hello everyone,

My problem include "free flow" and "porous flow" domains for which I am going to consider transport of chemical species. In the convection-diffusion equation for the porous flow, The soure term, has a PDE form of an unknown variable (b) appeared in the source term. (attached image).

I was wondering to know how I can introduce this unkonwn variable and then define the source term PDE (second equation in the attached image) coupled with advection-diffusion equation (1st equation in the attached image). Any help is greatly appreciated.

Best regards, Atefeh razavi



0 Replies Last Post 08.10.2018, 18:56 GMT-4
COMSOL Moderator

Hello Atefeh Razavi

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