Experimental study: Effect of pore geometry and structural heterogeneity on the repetitive two-phase fluid flow in porous media and its implications to PM-CAESJingtao Zhang, Haipeng Zhang, Donghee Lee, Sangjin Ryu and Seunghee KimE3S Web Conf., 205 (2020) 07010DOI: https://doi.org/10.1051/e3sconf/202020507010