Apparatus for real-time acoustic imaging of Rayleigh-Benard convection

Details Apparatus for real-time acoustic imaging of Rayleigh-Benard convection Apparatus for real-time acoustic imaging of Rayleigh-Benard convection

2007-07-23

arxiv.org/abs/0707.3293v1

Rev Sci Instrum. 2007 Nov;78(11):113704

Physics

Condensed Matter

Materials Science

20 pages, 11 figures, submitted to the Review of Scientific Instruments

Scientific paper

10.1063/1.2804133

We have designed and built an apparatus for real-time acoustic imaging of convective flow patterns in optically opaque fluids. This apparatus takes advantage of recent advances in two-dimensional ultrasound transducer array technology; it employs a modified version of a commercially available ultrasound camera, similar to those employed in non-destructive testing of solids. Images of convection patterns are generated by observing the lateral variation of the temperature dependent speed of sound via refraction of acoustic plane waves passing vertically through the fluid layer. The apparatus has been validated by observing convection rolls in both silicone oil and ferrofluid.

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