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Visual and dynamical measurement of Rayleigh-Benard convection by using fiber-based digital holographic interferometry

Authors :
Yajun Jiang
Abdul Rauf
Jun Wang
Hongzhen Jiang
Jianglei Di
Jianlin Zhao
Source :
Journal of Applied Physics. 112:113113
Publication Year :
2012
Publisher :
AIP Publishing, 2012.

Abstract

We present a method for visual and dynamical measurement of the Rayleigh-Benard convection by using fiber-based digital holographic interferometry. A SM600 fiber with 4 μm core diameter is used instead of conventional pinhole, which has better performance to filter out the noises, effectively modify the structure of the optical path and relax the requirement of the laser performance (e.g., coherence length and beam uniformity). The experimental results show the development process of Rayleigh-Benard cell in the container. The corresponding Rayleigh number is 3.6. In the process, the temperature at the top and bottom plates is controlled at 295 K and 300 K, respectively. The measured temperature distribution and the number of Rayleigh-Benard cell are verified by using simulation and are in good agreement.

Details

ISSN :
10897550 and 00218979
Volume :
112
Database :
OpenAIRE
Journal :
Journal of Applied Physics
Accession number :
edsair.doi...........44e7042ec3bdd870568822333d873a6d
Full Text :
https://doi.org/10.1063/1.4768911