Size distribution of bubbles in agitated viscous Newtonian and non-Newtonian solutions

Momiroski, V, Bhattacharya, S, Davoody, M, Bin Abdul Raman, A and Parthasarathy, R 2018, 'Size distribution of bubbles in agitated viscous Newtonian and non-Newtonian solutions', Asia-Pacific Journal of Chemical Engineering, vol. 13, no. 6, pp. 1-21.

Document type: Journal Article
Collection: Journal Articles

Title Size distribution of bubbles in agitated viscous Newtonian and non-Newtonian solutions
Author(s) Momiroski, V
Bhattacharya, S
Davoody, M
Bin Abdul Raman, A
Parthasarathy, R
Year 2018
Journal name Asia-Pacific Journal of Chemical Engineering
Volume number 13
Issue number 6
Start page 1
End page 21
Total pages 21
Publisher John Wiley & Sons Ltd.
Abstract The effects of impeller type, Newtonian shear thinning liquid viscosities, and noncoalescing conditions on the impeller gas cavities, impeller power consumption, and Sauter mean bubble diameter (d32) in a multiphase agitated vessel were systematically studied. An underwater recording technique was used to study gas cavities and bubble size in various operating and design conditions. The gas cavity images were used to relate d32 to gas cavity structure. It was observed that d32 values increase with an increase in Newtonian and shear thinning liquid viscosities. Results also indicate that impellers operating in shear thinning liquids consume higher gassed power at the same operating conditions compared with those in Newtonian fluids. In addition, the d32 values in noncoalescing liquids are substantially smaller compared with those in coalescing solutions at the same Pg/V. Mathematical correlations are proposed for estimating the d32 in the impeller discharge stream and Pg/V in viscous Newtonian and non-Newtonian solutions.
Subject Chemical Engineering Design
Keyword(s) bubble size
gas cavities
gasliquid hydrodynamics
mathematical correlations
non‐Newtonian liquid
power consumption
DOI - identifier 10.1002/apj.2267
Copyright notice © 2018 Curtin University and John Wiley & Sons, Ltd.
ISSN 1932-2135
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