کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
651791 | 1457438 | 2012 | 5 صفحه PDF | دانلود رایگان |
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.
► We describe the light-attenuation technique applied to buoyancy-driven flows.
► We summarise the key factors for the successful application of the technique.
► A comparison between two dying agents is presented.
► Steps for extracting density-field data are outlined discussed.
► The accuracy of the technique is compared with direct measurements.
Journal: Experimental Thermal and Fluid Science - Volume 38, April 2012, Pages 257–261