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Size distribution of bubbles in agitated viscous N ewtonian and non‐ N ewtonian solutions

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 u...

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Main Authors: Momiroski, Vinko, Bhattacharya, Sati, Davoody, Meysam, Abdul Raman, Abdul Aziz, Parthasarathy, Rajarathinam
Format: Article
Published: Wiley 2018
Subjects:
TP Chemical technology
Online Access:http://eprints.um.edu.my/21222/
https://doi.org/10.1002/apj.2267
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spelling my.um.eprints.212222019-05-14T05:22:08Z http://eprints.um.edu.my/21222/ Size distribution of bubbles in agitated viscous N ewtonian and non‐ N ewtonian solutions Momiroski, Vinko Bhattacharya, Sati Davoody, Meysam Abdul Raman, Abdul Aziz Parthasarathy, Rajarathinam TP Chemical technology 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. Wiley 2018 Article PeerReviewed Momiroski, Vinko and Bhattacharya, Sati and Davoody, Meysam and Abdul Raman, Abdul Aziz and Parthasarathy, Rajarathinam (2018) Size distribution of bubbles in agitated viscous N ewtonian and non‐ N ewtonian solutions. Asia-Pacific Journal of Chemical Engineering, 13 (6). e2267. ISSN 1932-2135 https://doi.org/10.1002/apj.2267 doi:10.1002/apj.2267
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Momiroski, Vinko
Bhattacharya, Sati
Davoody, Meysam
Abdul Raman, Abdul Aziz
Parthasarathy, Rajarathinam
Size distribution of bubbles in agitated viscous N ewtonian and non‐ N ewtonian solutions
description 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.
format Article
author Momiroski, Vinko
Bhattacharya, Sati
Davoody, Meysam
Abdul Raman, Abdul Aziz
Parthasarathy, Rajarathinam
author_facet Momiroski, Vinko
Bhattacharya, Sati
Davoody, Meysam
Abdul Raman, Abdul Aziz
Parthasarathy, Rajarathinam
author_sort Momiroski, Vinko
title Size distribution of bubbles in agitated viscous N ewtonian and non‐ N ewtonian solutions
title_short Size distribution of bubbles in agitated viscous N ewtonian and non‐ N ewtonian solutions
title_full Size distribution of bubbles in agitated viscous N ewtonian and non‐ N ewtonian solutions
title_fullStr Size distribution of bubbles in agitated viscous N ewtonian and non‐ N ewtonian solutions
title_full_unstemmed Size distribution of bubbles in agitated viscous N ewtonian and non‐ N ewtonian solutions
title_sort size distribution of bubbles in agitated viscous n ewtonian and non‐ n ewtonian solutions
publisher Wiley
publishDate 2018
url http://eprints.um.edu.my/21222/
https://doi.org/10.1002/apj.2267
_version_ 1643691501842071552
score 13.211869

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