文献类型：期刊文献

英文题名：Investigation of droplet dynamic in PEMFCs gas diffusion layer and gas channel with Micro-CT and lattice Boltzmann method

作者：Lv, Xuecheng[1];Zhou, Zhifu[2];Wu, Wei-Tao[3];Wei, Lei[4];Gao, Linsong[5];Lyu, Jizu[6];Hu, Chengzhi[1];Li, Yang[1];Li, Yubai[1];Song, Yongchen[1]

机构：[1]Dalian Univ Technol, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian 116024, Peoples R China;[2]Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China;[3]Nanjing Univ Sci & Technol, Sch Mech Engn, Nanjing 210094, Peoples R China;[4]Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China;[5]Xiangtan Univ, Sch Mech Engn & Mech, Xiangtan 411105, Peoples R China;[6]Guangdong Ocean Univ, Sch Mech Engn, Zhanjiang 524088, Peoples R China

年份：2025

卷号：381

外文期刊名：FUEL

收录：SCI-EXPANDED(收录号：WOS:001357437300001)、、EI(收录号：20244617359876)、Scopus(收录号：2-s2.0-85208666217)、WOS

基金：This work is supported by the National Natural Science Foundation of China (Grant No. 52106226, 52176058) , supported by Program for Scientific Research Start-up Funds of Guangdong Ocean University (Grant No. 060302062309) . Micro-CT data were obtained using equip-ment maintained by Instrumental Analysis Center, Dalian University of Technology.

语种：英文

外文关键词：Proton exchange membrane fuel cell; Gas diffusion layer; Gas channel; Droplet dynamics; Lattice Boltzmann method

外文摘要：This study reconstructed the 3D structure of the gas diffusion layer (GDL) in proton exchange membrane fuel cells (PEMFCs) using micro-CT technology and analyzed the droplet dynamics within the GDL and gas channel (GC) using the lattice Boltzmann method (LBM). A predictive model for droplet detachment at the GDL-GC interface was developed and its applicability under varying gas velocities and GDL wettability conditions was analyzed. Results indicate that, compared to single-scale GC spaces without GDL, significant differences exist in the droplet detachment trajectories and liquid bridge rupture points within the multi-scale GDL-GC spaces. Increased gas velocity and intrinsic contact angle within the GDL reduce the volume of detaching droplets and heighten detachment frequency. Optimal liquid water removal occurred at intrinsic contact angles between 120 degrees 140 degrees. Angles below this range impede droplet detachment in the GC, while angles above it result in water accumulation within the GDL. In the predictive model, the critical detachment force, generated by the liquid bridge connection, forms an angle with the gas flow, with its characteristic length defined by the minimum diameter at the bridge's necking.