In situ characterization of floc morphology by image analysis in a turbulent Taylor-Couette reactor

Abstract : Flocculation of bentonite was performed in a turbulent Taylor–Couette reactor under various shear rates. Image processing enabled to determine various morphological characteristics of individual flocs. Not only their mean values but also their distributions were studied under various hydrodynamic conditions. Relevant properties were selected. The temporal evolution of radius of gyration and circularity distributions was monitored during the flocculation process. Although size and shape are obviously correlated, this article points out that their dependency to hydrodynamics is different, showing that flocs of similar sizes produced under different hydrodynamic conditions exhibit different shapes. The sizes are calibrated by the turbulence as the double radius of gyration is close to Kolmogorov microscale, whereas the circularity seems correlated to the rotation speed. © 2014 American Institute of Chemical Engineers AIChE J, 60: 2389–2403, 2014
Complete list of metadatas

Cited literature [47 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01268767
Contributor : Archive Ouverte Prodinra <>
Submitted on : Tuesday, October 16, 2018 - 1:49:10 PM
Last modification on : Monday, July 15, 2019 - 2:20:04 PM
Long-term archiving on : Thursday, January 17, 2019 - 1:54:51 PM

File

Vlieghe_20297.pdf
Files produced by the author(s)

Identifiers

Citation

Melody Vlieghe, Carole Coufort-Saudejaud, Christine Frances, Alain Line. In situ characterization of floc morphology by image analysis in a turbulent Taylor-Couette reactor. AIChE Journal, Wiley, 2014, 60 (7), pp.2389-2403. ⟨10.1002/aic.14431⟩. ⟨hal-01268767⟩

Share

Metrics

Record views

98

Files downloads

98