Point-localized displacement measurement of the Faraday surface on a fluid

When a layer of fluid is excited using a vertical periodic acceleration, a subharmonic behaviour can be obtained called Faraday instability. It is well known that dynamic processes are generated by Faraday instability. However, only qualitative experimental results have been obtained in this regard....

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Bibliographic Details
Published in:Measurement science & technology 2002-10, Vol.13 (10), p.1625-1630
Main Authors: Cabeza, C, Gibiat, V, Negreira, C
Format: Article
Language:English
Subjects:
Computers in experimental physics
Exact sciences and technology
Image processing
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Mechanical instruments, equipment and techniques
Physics
Vibration isolation
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Summary:When a layer of fluid is excited using a vertical periodic acceleration, a subharmonic behaviour can be obtained called Faraday instability. It is well known that dynamic processes are generated by Faraday instability. However, only qualitative experimental results have been obtained in this regard. This work reports an original method based on a capacitive transducer to study and reconstruct the moving surface in Faraday experiments. The technique is accurate and a quantitative measurement of the surface displacement is achievable. 2 important results have been obtained: the numerical reconstruction of the patterns appearing on the surface because of Faraday instability; and the dynamic evolution to chaos of a localized point on the surface.
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/13/10/316