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- W4312141279 endingPage "2184" @default.
- W4312141279 startingPage "2184" @default.
- W4312141279 abstract "Falling film evaporation processes involve high fluid velocities with continuous variations in local film thickness, fluid composition, and viscosity. This contribution presents a parallel and complementary film thickness and concentration mapping distribution in falling films using a non-invasive fluorescence and near-infrared imaging technique. The experiments were performed with a mixture of glycerol/water with a mass fraction from 0 to 0.65 gglycgtotal−1 and operating ranges similar to evaporation processes. The measurement system was designed by integrating two optical measurement methods for experimental image analysis. The film thickness was evaluated using a VIS camera and high-power LEDs at 470 nm. The local glycerol concentration gglycgtotal−1 was determined using a NIR camera and high-power LEDs at 1050, 1300, 1450 and 1550 nm. A multiwavelength analysis with all NIR wavelengths was implemented with a better correlation for falling films at low flow velocity. The results show an improvement in the analysis of falling films with high flow velocities up to almost 500 mm/s by using only the 1450 nm wavelength and the fluorescence measurement. Simultaneous imaging analysis of film thickness and concentration in falling films provides further insight into understanding mass and heat transport and thus supports the optimization of falling film evaporators." @default.
- W4312141279 created "2023-01-04" @default.
- W4312141279 creator A5045156096 @default.
- W4312141279 creator A5076617580 @default.
- W4312141279 creator A5085127120 @default.
- W4312141279 date "2022-12-09" @default.
- W4312141279 modified "2023-10-18" @default.
- W4312141279 title "Film Thickness and Glycerol Concentration Mapping of Falling Films Based on Fluorescence and Near-Infrared Technique" @default.
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- W4312141279 doi "https://doi.org/10.3390/mi13122184" @default.
- W4312141279 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36557483" @default.
- W4312141279 hasPublicationYear "2022" @default.
- W4312141279 type Work @default.