Ex-situ experimental study on dynamic behaviors and detachment characteristics of liquid water in a transparent channel of PEMFC

A transparent model cell for direct ex-situ visualization of the dynamic characteristics growth, deformation and detachment liquid water in flow channel proton exchange membrane fuel (PEMFC) is designed. It fulfills requirements clear side imaging droplet behaviors channel. Different air velocities are implemented experiments to measure growth on gas diffusion layer (GDL) surface. The results show that time shorter size smaller with higher velocity. Three stages defined, which oscillation removal droplet. evolution contact angle line at different extracted relevant revealed. These important quantitative characterization GDL surface, can also provide valuable parameters validation transport simulations PEMFC.