Accurate analysis of fracture and flow processes occurring across scales within porous media affects broad range hydrogeological problems, such as geothermal exploration, hydrocarbon recovery, geological CO2 sequestration and nuclear waste disposal. All of these problems are fundamentally affected by small‐scale processes and are usually solved by loosely coupled upscaling, where in many cases adequate upscaled representation isn't available. This naturally calls for development of tightly coupled multiscale hybrid methods. Multiscale hybrid methods combine multiple models at different spatial/temporal scales, often utilizing different representations of physical or chemical processes. Therefore, this session provides a forum for researchers to exchange ideas on advancing the state-of-the-art of both hybrid methods and accompanying experimental validation/verification studies for fracture and flow problems. Topics include, but are not limited to coupling of 1) imaging techniques with continuum or atomistic models 2) inverse methods with real-time measurements 3) atomistic methods with continuum approaches.