Physicochemical processes occurring within porous media, such as fluid flow, species transport, and mechanical deformation have far reaching practical implications from designing effective strategies for contaminant cleanup of soil and groundwater, engineering targeted solutions for geological carbon storage and sustainable production of subsurface energy, to optimizing manufacturing components in fuel cells and batteries. Reliable control of these processes requires an in-depth understanding of the underlying pore-scale physics. Recent advances in computational methods and experimental techniques have opened a new window towards visualizing, measuring, validating, understanding, and ultimately predicting pore-scale processes. Accordingly, this session broadly solicits submissions that present new experimental, computational, or theoretical developments that specifically target the pore scale. Topics may include, but are not limited to, single/multiphase flow, passive/reactive transport, interfacial and wetting dynamics, deformable porous media, nanoporous materials (e.g., shales), biogeochemical alterations, complex fluids, granular physics, microfluidics, approximation and order-reduction algorithms, and coupling across processes/scales.