Hi,
I'm trying to solve the Butler-Volmer equation using Secondary Current Distribution physic. The values of electrode potential and electronic potential are calculated as what is expected. But, the direction of both electrode current density and electrolyte current density vectors are in the reverse side (in comparison with the case I'm trying to validate my results by) Is it by accident that the magnitude of the current density vector is correct but the direction is not? or there are any other approaches to determining the direction? does anyone have enough experience using this physic who can help me?
Thanks in advance, Shahide