Experimental study on nanobubble distribution control method based on the slip drag reduction effect

We compared the nanobubbles nucleation and slip phenomena on four morphological HOPG surface within the nanochannel by molecular-dynamics simulation, and results showed that the distribution morphology of nanobubbles played a decisive factor in the slip reduction, and the larger equivalent nano-gas film thickness, the larger the slip length. The four experimental plans were advanced in layers using AFM under-liquid experiments and the control of the nanobubble distribution morphology was successfully achieved. The optimal combination of experimental parameters effectively improves the nano-gas film thickness. The experimental method of distribution morphology control of nanobubbles and the effect analysis of equivalent nano-gas film thickness on slip reduction are proposed to provide technical support for the engineering application of nanobubble drag reduction lubrication.