Hello, thank you for proposing this question.

I have been working on estimating gas permeation in 'gas diffusion layers' (GDLs) used in PEM fuel cells for power generation. During my course of research I could essentially utilize fundamentals models into working experiments and secure results. However, I would rather specify the challanges here, and would expect the community to help me with some leads.

1. Transport of gas in porous media, can be affected in more than one way, however the concept of Knudsen diffusion (in relation to the nature of gas) needs a far more rigorous interpretation.

2. The influence of relative humidity (Dry gas+vapour) flow in the porous media also needs a strong understanding.

Thanks and regards

Intersting topic of research