- Title
- Surface foam film waves studied with high-speed linescan camera
- Creator
- Karakashev, Stoyan Ivanov; Nguyen, Anh Van; Manev, Emil D.; Phan, Minh Chi
- Relation
- Colloids and Surfaces a-Physicochemical and Engineering Aspects Vol. 262, no. 1-3, p. 23-32
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2005
- Description
- Dynamic foam films have been investigated using an improved experimental set-up with a CCD high-speed linescan camera in conjunction with the Scheludko micro-interferometric cell for studying the drainage and rupture of liquid foam films. The improved experimental set-up increased the sensibility of detection of the local thickness heterogeneities and domains during the film evolution. The evolution of the foam films up to the formation of black spots was recorded in the time intervals of 50ms. The wavelengths of the propagating surface waves and their frequencies were determined experimentally. The experimental results show that the current quasi-static hydrodynamic theory does not properly describe the wave dynamics with inter-domain channels. However, the thermodynamic condition for formation of black spots in the foam films was met by the experimental results.
- Subject
- foam films; film dynamics; Marangoni effect; film evolution; thin liquid-films; sodium dodecyl-sulfate; wetting films; critical; thickness; emulsion films; dimple relaxation; aqueous-solutions; light-scattering; hydrodynamics; drainage
- Identifier
- uon:385
- Identifier
- http://hdl.handle.net/1959.13/25408
- Identifier
- ISSN:0927-7757
- Language
- eng
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