Fine particle turbulence modulation

Harbottle, David, Biggs, Simon and Fairweather, Michael (2011) Fine particle turbulence modulation. AIChE Journal, 57 7: 1693-1699. doi:10.1002/aic.12388


Author Harbottle, David
Biggs, Simon
Fairweather, Michael
Title Fine particle turbulence modulation
Journal name AIChE Journal   Check publisher's open access policy
ISSN 0001-1541
1547-5905
Publication date 2011-01-01
Year available 2008
Sub-type Article (original research)
DOI 10.1002/aic.12388
Open Access Status
Volume 57
Issue 7
Start page 1693
End page 1699
Total pages 7
Place of publication Hoboken, NJ, United States
Publisher John Wiley & Sons
Language eng
Abstract Streamwise turbulence intensities of fine particulate suspensions were studied in a 26 mm N.B. horizontal pipe loop. Colloidal silica spheres were prepared in 10-4M and 1M KNO3 solutions to control the degree of aggregate formation in the suspension. Using an ultrasonic Doppler velocity profiling sensor, the turbulence intensities of the fine particle suspensions were compared with those of a particle-free flow over a range of Reynolds numbers. At low electrolyte concentration, the silica particles remain dispersed, with the turbulence intensity of the suspension flow comparable with that of the particle-free flow. At high electrolyte concentration, increased particle-particle interaction leads to the formation of particle aggregates which support turbulence augmentation over a critical Reynolds number range. The range of Reynolds numbers over which this turbulence enhancement is observed is limited by both fluid dynamic effects at low Reynolds numbers (Re ≈ 5500) and aggregate breakup at high Reynolds numbers (Re ≈ 8000).
Keyword Aggregation
Colloidal particles
Turbulence modulation
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID EP/C549465/1
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Faculty of Engineering, Architecture and Information Technology Publications
 
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