We report a novel flow dynamics at the interface of liquid and gas through
nanofluidic pores without applying any external driving force. Rayleigh-Taylor
instability of water and air in sub-100 nanometer fluidic pores in a micrometre
square domain of water and air are studied. We analyse it in the context of
parameters, such as applied pressure, position to pore size ratio of the
nanofluidic pore, gravity, and density. Our research also verifies the flow
velocity equation with the simulation results and discuss the mass transfer
efficiency of such flow structures. This is the first report on a self-driven
switching mechanism of nanofluidic flow from ON to OFF or vice versa. A highly
nonlinear complex nature of fluid dynamics is observed in nanometric
length-scale, which is also one of the first studies in room temperature.
Self-driven nanofluidics will have a large positive impact on biosensors,
healthcare, net-zero sustainable energy production, and fundamental physic of
fluid dynamics