肥皂膜
冲击波
肺表面活性物质
激光器
材料科学
休克(循环)
机械
马朗戈尼效应
流量(数学)
光学
物理
化学
对流
医学
生物化学
内科学
标识
DOI:10.1103/physrevfluids.9.l022001
摘要
We propose a focused laser heating method to study wave properties of flowing soap films. The laser-induced thermocapillary flows lead to symmetric disturbances in film thickness. The shock waves originating from the propagating symmetric elastic waves, which have remained elusive despite considerable experimental efforts, are thus stimulated on flowing soap films with low surfactant concentrations, or appreciable elasticities. Interestingly, on soap films with high surfactant concentrations, or vanishingly small elasticities, the laser-induced disturbances in film thickness remain unchanged and flow with the film without propagating, creating ``laser-engraving'' on free liquid films.
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