State transition of stable nanobubbles to unstable microbubbles on homogeneous surfaces

State transition of stable nanobubbles to unstable microbubbles on homogeneous surfaces
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均匀表面上稳定纳米气泡到不稳定微气泡的状态转变

DOI:
10.1103/physrevfluids.7.103601
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发表时间:
2022-10
影响因子:
2.7
通讯作者:
Jun Hu
Jun Hu
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Binghai Wen;Yongcai Pan;Lijuan Zhang;Shuo Wang;Limin Zhou;Chunlei Wang;Jun Hu

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实验已经揭示了表面纳米气泡的寿命非常长,但实验也证明了微米以上的气泡的扩散不稳定性,因此迫切需要对气泡稳定性转变的物理理解。在这里,我们开发了一个模型来捕捉从稳定的纳米气泡不稳定的微气泡均匀表面上的状态转变。过渡解释了实验中观察到的表面纳米气泡的典型的长寿命,有限的高度和小接触角。相图表明,气泡尺寸和溶解气体饱和度决定了表面气泡的动力学行为,即增长、稳定、收缩或溶解。
Experiments have revealed the remarkably long lifetime of surface nanobubbles, but experiments have also demonstrated the diffusive instability of bubbles above micrometers; thus a physical understanding on the transition of bubbles stability is in urgent need. Herein, we develop a model to capture the state transition from stable nanobubbles to unstable microbubbles on homogeneous surfaces. The transition explains the typical long lifetime, limited height, and small contact angle of surface nanobubbles observed in experiments. The phase diagram shows that the bubble size and dissolved gas saturation determine the dynamic behaviors of surface bubbles, namely growth, stability, shrinkage, or dissolution.
环境水中被限制在表面纳米气泡中的超高密度气体分子
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