Selamet, O. F.Pasaogullari, U.Spernjak, D.Hussey, D. S.Jacobson, D. L.Mat, M. D.Gasteiger, HAWeber, ANarayanan, SRJones, DStrasser, PSwiderLyons, KBuchi, FNShirvanian, PNakagawa, HUchida, HMukerjee, SSchmidt, TJRamani, VFuller, TEdmundson, MLamy, CMantz, R2019-08-012019-08-012011978-1-60768-255-4 -- 978-1-60768-254-71938-5862https://dx.doi.org/10.1149/1.3635568https://hdl.handle.net/11480/476411th Polymer Electrolyte Fuel Cell Symposium (PEFC) Under the Auspices of the 220th Meeting of the ECS -- OCT, 2011 -- Boston, MAIn proton exchange membrane (PEM) electrolyzers, oxygen evolution in the anode and flooding due to water cross-over results in two distinct two-phase transport conditions, and these two phenomena were found to strongly affect the performance. A comprehensive understanding of two-phase flow in PEM electrolyzer is required to increase efficiency and aid in material selection and flow field design. In this study, two-phase transport in an electrolyzer cell is visualized by simultaneous neutron radiography and optical imaging. Optical and neutron data were used in a complementary manner to aid in understanding the two-phase flow behavior. The behavior of the gas bubbles was investigated and two different gas bubble evolution and departure mechanisms are found. It was also found that there is a strong non-uniformity in the gas bubble distribution across the active area, due to buoyancy and proximity to the water and purge gas inlet.eninfo:eu-repo/semantics/closedAccessConference Object41134936210.1149/1.36355682-s2.0-84866377742Q4WOS:000309598800030N/A