Aerosol Entrainment from a Sparged Non-Newtonian Slurry

Previous bench-scale experiments have provided data necessary for the development of empirical models that describe aerosol entrainment from bubble bursting. However, previous work has not been extended to non-Newtonian liquid slurries. Design of a waste treatment plant on the Hanford Site in Washin...

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Bibliographic Details
Published in:Journal of the Air & Waste Management Association (1995) 2006-08, Vol.56 (8), p.1108-1114
Main Author: Fritz, Brad G.
Format: Article
Language:English
Subjects:
Aerosols
Air Pollutants, Occupational - analysis
Algorithms
Applied sciences
Atmospheric pollution
Design
Design and construction
Environmental Monitoring
Exact sciences and technology
General treatment and storage processes
Measurement
Models, Statistical
Non-Newtonian fluids
Particle Size
Pollution
Radioactive wastes
Shear stress
Ventilation
Waste treatment facilities
Wastes
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Summary:Previous bench-scale experiments have provided data necessary for the development of empirical models that describe aerosol entrainment from bubble bursting. However, previous work has not been extended to non-Newtonian liquid slurries. Design of a waste treatment plant on the Hanford Site in Washington required an evaluation of the applicability of these models outside of their intended range. For this evaluation, aerosol measurements were conducted above an air-sparged mixing tank filled with simulated waste slurry possessing Bingham plastic rheological properties. Three aerosol-size fractions were measured at three sampling heights and for three different sparging rates. The measured entrainment was compared with entrainment models. One model developed based on bench-scale air-water experiments agreed well with measured entrainment. Another model did not agree well with the measured entrainment. It appeared that the source of discrepancy between measured and modeled entrainment stemmed from application beyond the range of data used to develop the model. A possible separation in entrainment coefficients between air-water and steam-water systems was identified. A third entrainment model was adapted to match experimental conditions and fit a posteri to the experimental data, resulting in a modified version that resulted in estimated entrainment rates similar to the first model.
ISSN:1096-2247
2162-2906
DOI:10.1080/10473289.2006.10464531