CUED Publications database

On the application of the light-attenuation technique as a tool for non-intrusive buoyancy measurements

Allgayer, DM and Hunt, GR (2012) On the application of the light-attenuation technique as a tool for non-intrusive buoyancy measurements. Experimental Thermal and Fluid Science, 38. pp. 257-261. ISSN 0894-1777

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Abstract

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. © 2011 Elsevier Inc.

Item Type: Article
Uncontrolled Keywords: Buoyancy-driven flows Light-attenuation Measurements Visualisation
Subjects: UNSPECIFIED
Divisions: Div A > Fluid Mechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:29
Last Modified: 08 Dec 2014 02:30
DOI: 10.1016/j.expthermflusci.2011.10.009