Journal
EXPERIMENTAL THERMAL AND FLUID SCIENCE
Volume 38, Issue -, Pages 257-261Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.expthermflusci.2011.10.009
Keywords
Light-attenuation; Measurements; Visualisation; Buoyancy-driven flows
Funding
- Imperial College London
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This article describes the application of the light-attenuation technique as a tool for measuring dilution occurring in buoyancy-driven flows. Whilst this technique offers the experimental fluid dynamicist the ability to make rapid synoptic buoyancy measurements non-intrusively, its successful application requires careful selection of chemical dye, dye concentration, illumination and optics. After establishing the advantages offered by methylene blue as a dyeing agent, we assess the accuracy of buoyancy measurements made using this technique compared with direct measurements made with density meters. Density measurements obtained using light-attenuation differ from those obtained using the density meter by typically less than 3%. It is hoped that this article will provide useful advice with regards to its implementation in the field of buoyancy-driven flows. (C) 2011 Elsevier Inc. All rights reserved.
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