Reacting Flow in Porous Media of the Membraneless Fuel Cell

Hi All,

Please, I need to simulate the reacting flow in porous media at membraneless fuel cell. Firstly, I am just trying to simulate laminar flow and transport of diluted species. Furthermore, I am not able to obtain the values of he reacting flow in porous media at Gas Diffusion Electrode of the microchannel fuel cell. Cause I have some error with my model as following:

Failed to find a solution for the initial parameter.
Segregated group 1

Singular matrix.

There are 1 void equations (empty rows in matrix) for the variable comp1.rfcs2.Pinlinl1.
at coordinates: (0,0,0), ...
and similarly for the degrees of freedom (empty columns in matrix).
In segregated group 1:
Returned solution is not converged.


If anyone can give me some suggestion it would be really welcome.
Thank you very much.

regards,
Yusuf