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In this paper, we explore the influence of fracture roughness on foam transport and structure. Foam flow is studied using core flood experiments and novel Lattice Boltzmann method simulations for application in fractured porous media. From experiments, it was observed that a fracture with a rough surface decreased the tendency of lamella collapse and increased apparent viscosity in comparison to the saw-cut smooth fracture. In the temperature range of 40 °Cto 60 ℃, foam structure was more stable at lower ends of this temperature range. Using Lattice Boltzmann method simulations, we applied an existing foam algorithm in 2D fracture geometries and qualitatively assessed foam structure in both smooth and rough fracture geometries. We observed that the foam bubbles in the smooth fracture were smaller and more uniform, like a bulk foam. The bubbles in the rough fracture were smaller at the center of the …