Conducting fluid dynamics experiments with vertically falling soap films

Citation
Ma. Rutgers et al., Conducting fluid dynamics experiments with vertically falling soap films, REV SCI INS, 72(7), 2001, pp. 3025-3037
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
REVIEW OF SCIENTIFIC INSTRUMENTS
ISSN journal
0034-6748 → ACNP
Volume
72
Issue
7
Year of publication
2001
Pages
3025 - 3037
Database
ISI
SICI code
0034-6748(200107)72:7<3025:CFDEWV>2.0.ZU;2-N
Abstract
This article gives a detailed description of an apparatus in which flowing soap films are used to perform two dimensional fluid dynamics experiments. We have previously reported scientific findings made with the apparatus, bu t never carefully described the technique, or its full potential. A brief i ntroduction is given on the nature of soap films as fluids and then all the details necessary for creating robust flowing films are listed. Typical pa rameters for the system are: flow speeds from 0.5 to 4 m/s, film thickness between 1 and 10 mum, and typical film sizes are 3 m tall and 10 cm wide al though films of 20 m tall and 4 m wide have also been made. A vacuum appara tus is also described in which the air drag on the film can be reduced by a factor of 5-10. Finally, a large number of techniques for measuring flow a nd thickness are outlined and referenced. (C) 2001 American Institute of Ph ysics.