An ex-situ visualization experimental system was established to study the growth and deformation process of a single droplet in a rectangular channel for the proton exchange membrane fuel cell (PEMFC). The droplet morphology was observed and recorded by a CCD camera. Three different methods for automatically obtaining droplet size and contact angle information were developed. The influence of air flow velocities on droplet dynamic process was analyzed.
Keywords Dynamic contact angle, Visualization, Proton exchange membrane fuel cell, Image processing