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

作者：Wang, Chao; Lu, Yan^*; Feng, Donghui; Zhou, Jiayuan; Li, Yangfan; Zhang, Hao

来源：Tribology International, 2023, 177: 107940.

DOI：10.1016/j.triboint.2022.107940

• Nanobubbles
• Velocity slip
• Distribution pattern
• Drag reduction

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 nano -bubbles 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 dis-tribution 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.

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