| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
To investigate stabilization mechanism of liquid sheets formed with aqueous surfactant solutions (soap films), slight force was applied to the liquid sheet non-invasively, and time variable sheet thickness was measured optically until the rupture of the liquid sheet. The slight force was created using thermo-capillary effect. When the soap film is heated locally with a laser, spatial temperature distribution induces Marangoni force. Marangoni force pulls the heated spot outward and causes the rupture. Measured thickness of the liquid sheet demonstrates that the liquid sheet hardly moves untill the Marangoni force reaches a certain value and then ruptures suddenly. This brittle fracture is very discriminative for the soap film. We also demonstrate the relation between rupture time and Marangoni force and consider the dependency of the rupture time on the molecular adsorption density.
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