纳米通道内超疏水性表面气泡的运动

疏水表面纳米气泡的运动有重要的应用价值和研究意义。本文采用分子动力学方法,模拟了纳米通道壁面为超疏水性时壁面上气泡的运动状况。在质量力驱动下,随着外界驱动力的增大,两壁面上的气泡被逐渐拉长,同时逐渐变得扁平;前端"接触角"逐渐增大,而后端"接触角"逐渐减小。纳米通道内疏水性表面的纳米气泡随着外部驱动力的变化呈现出不同的形态,变化程度随着驱动力的增大而增大。在不同驱动力作用下,两个气泡总是保持相同的速度,气泡的速度与外力驱动的大小呈线性增长趋势。随着外力的增大,边界层及通道中心速度皆呈现增大趋势。

The Movement of Nanobubbles on the Super-Hydrophobic Surface in the Nanochannel

The movement of the hydrophobic surface nanobubbles has important application value and research significance.Molecular dynamics method was adopted to simulate the movement of bubbles in the nanochannel with the super-hydrophobic surface.With the increase of the external driving force,the bubbles on the two surfaces are gradually elongated,and gradually become flat; front-end "contact angle" is gradually increasing,while the back-end contact angle decreases gradually. Different forms of nanobubbles in nanochannel with super-hydrophobic surface presented with the changes of the external driving force,the degree of change increases with the increase of the driving force.The two bubbles always maintain the same speed under different driving forces.The bubble velocity increases linearly with the driving force.With the external force increasing,the velocity of the boundary layer and channel centers are showing increasing trend.