Hi COMSOL users,
In the Equation View of Transport Properties under Transport of Dilute Species Module, there are two kinds of flux definitions. One is defined on all the boudaries, called Normal total/diffusive/electrophoretic flux. The other is defined on domains, called Total flux whose magnitude is calculated from the total flux components (defined in domains). See images attached.
Assuming that flux tangent to the boundary is 0, the normal total flux should equal to the total flux magnitude. However, what I found is that they are not the same.
I understand that boundary nodes are treated differently from those internal nodes. This should ensure the flux calculated from the domain values and boundary treatments are the same.
I would appreciate it if there is any helpful explanation or related comments! Thanks!