Aleksey Gerasimov
Subscriber

Hello Victoria,

Please see answers below.

1) There are a few ways to specify the potentiostatic or galvanostatic boundary conditions. You can set them on individual walls (taps) or in the SOFC panel. If you set the total current of 0.01A then there is no need to specify anything else on individual boundaries, These inputs on boundarires will be ignored in such case.

2) You can use either approach, by specifying voltage and getting current or vice versa. I believe either this tutorial or our PEMFC tutorial explain this. The prescribed current (galvanostatic b.c.) is often used, because, it allows us to identify the inlet mass flow rates that are needed for a desired stoicheometry. However, this approach works well if the model include cables or bus bars, where a uniform current density distribution is realistic. However, the potentiostatic boundary conditions are better in those cases, where the electric b.c.'s need to be applied to bipolar plates, A prescribed uniform current over wider surfaces in such cases is neither realistic nor physical, thus causing the additional convergence issues.

3) No, the specified voltage is the operational voltage e.g. values from column 1 in Table 2 on page 30.

Best regards,

Aleksey