Concentration trap

Christopher Yi Electrochemistry

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With the transport of dilute species (tds) module, I have two domains, one is a reservoir of the species and the other is a finite-concentration trap. Both domains start with 0 concentration and a constant diffusion coefficient D, no convection. A boundary of the reservoir is set to a constant concentration to produce species.

What I want to achieve is that the flux on the boundary between the domains is defined by D* before the concentration of the trap reaches a concentration limit. Once the concentration limited is reached, there will be no flux.

I thought I can set a forced flux on this boundary but COMSOL does not allow me to. Is there a work around? Thank you

Kind regards, Christopher


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