The fluids under nano-confinement show broad application prospect in membrane separation

mesoporous catalyst

etc.

benefiting from the specific phenomena occurring at this small scale compared with that at macro scales. The layered and ordered structure of the fluids near the wall and its effect on the hydrodynamic characteristics of the fluids are the main differences from those at macro scales. The common rule of the molecules aggregation structure and the electric double-layer structure of fluids under nano-confinement

and their effects on the self-diffusion property and wall slip phenomenon are reviewed. The applicability of the macroscopic continuum theory in fluids under nano-confinement is discussed. Finally

future development of fluids hydrodynamics under nano-confinement is envisaged.