Spatiotemporal evolution of thin liquid films during impact of water bubbles on glass on a micrometer to nanometer scale

• Main Authors: Hendrix, Maurice H. W., Chan, Derek Y. C., Manica, Rogerio, Klaseboer, Evert, Ohl, Claus-Dieter
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Science::Physics
• Online Access: https://hdl.handle.net/10356/95106; http://hdl.handle.net/10220/9254
• Institution: Nanyang Technological University

Collisions between millimeter-size bubbles in water against a glass plate are studied using high-speed video. Bubble trajectory and shape are tracked simultaneously with laser interferometry between the glass and bubble surfaces that monitors spatial-temporal evolution of the trapped water film. Initial bubble bounces and the final attachment of the bubble to the surface have been quantified. While the global Reynolds number is large (∼102), the film Reynolds number remains small and permits analysis with lubrication theory with tangentially immobile boundary condition at the air-water interface. Accurate predictions of dimple formation and subsequent film drainage are obtained.