Bubble's rise characteristics in shear-thinning xanthan gum solution: a numerical analysis
Background: The rise of gaseous bubbles in shear-thinning liquid is a fundamental issue in fluid physics, particularly the bubbles rise dynamics in water-soluble xanthan gum concentration have a strong link for enhancing the stability of foams that have been encountered extensively in oil recovery,...
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ftunivnewcastnsw:uon:48002 2023-05-15T17:12:11+02:00 Bubble's rise characteristics in shear-thinning xanthan gum solution: a numerical analysis Islam, Md. Tariqul Nguyen, Anh V. Afzal, Asif The University of Newcastle. College of Engineering, Science & Environment, School of Engineering 2022 http://hdl.handle.net/1959.13/1468124 eng eng Elsevier ARC.CE200100009 http://purl.org/au-research/grants/arc/CE200100009 Journal of the Taiwan Institute of Chemical Engineers Vol. 132, Issue March 2022, no. 104219 10.1016/j.jtice.2022.104219 http://hdl.handle.net/1959.13/1468124 uon:48002 ISSN:1876-1070 bubble terminal velocity xanthan gum liquid velocity viscosity journal article 2022 ftunivnewcastnsw 2023-02-20T23:25:44Z Background: The rise of gaseous bubbles in shear-thinning liquid is a fundamental issue in fluid physics, particularly the bubbles rise dynamics in water-soluble xanthan gum concentration have a strong link for enhancing the stability of foams that have been encountered extensively in oil recovery, methane hydrate formation processing, froth flotation, and food and beverage industries. Methods: Here, air bubble rise behavior in xanthan gum solution (XGs) was investigated by using a coupled volume of fluid with the level set approach in CFD (computational fluid dynamics) modelling. The Carreau-Yasuda rheological model was adopted to define the viscous properties of the XGs and the continuum surface force model was used to track the interface between bubble and XGs. Additionally, ANN (artificial neural network) modeling was demonstrated for estimating the outputs of CFD. Our estimated CFD results for different bubble terminal velocities in water and experimental data obtained from the literature showed that there was a maximum relative error of 4.51%. Then, the CFD setup was utilized to investigate the effect of different concentrations of XGs and liquid flow index (N) on bubble rise dynamics within the bubble Reynolds number (Reb) range up to 10.05 and Eotvos number (Eo) range up to 3.47. Significant findings: For a fixed bubble size, the dimensionless bubble terminal velocity decreased in increased flow index and concentration of XGs, which led to decrease Reb and increase Eo. For a given XGs, the dimensionless bubble terminal velocity significantly depends on Reb and Eo. It was found that XGs and flow index significantly affect the distribution of dimensionless liquid viscosity than that of the dimensionless liquid velocity close to the bubble's underneath region. In a comparison with the rheological power-law model, the Carreau-Yasuda model showed to predict more accurate results. The estimated drag coefficient showed a deviation from the empirical equation reported in the literature, in contrast, a more ... Article in Journal/Newspaper Methane hydrate NOVA: The University of Newcastle Research Online (Australia) |
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NOVA: The University of Newcastle Research Online (Australia) |
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ftunivnewcastnsw |
language |
English |
topic |
bubble terminal velocity xanthan gum liquid velocity viscosity |
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bubble terminal velocity xanthan gum liquid velocity viscosity Islam, Md. Tariqul Nguyen, Anh V. Afzal, Asif Bubble's rise characteristics in shear-thinning xanthan gum solution: a numerical analysis |
topic_facet |
bubble terminal velocity xanthan gum liquid velocity viscosity |
description |
Background: The rise of gaseous bubbles in shear-thinning liquid is a fundamental issue in fluid physics, particularly the bubbles rise dynamics in water-soluble xanthan gum concentration have a strong link for enhancing the stability of foams that have been encountered extensively in oil recovery, methane hydrate formation processing, froth flotation, and food and beverage industries. Methods: Here, air bubble rise behavior in xanthan gum solution (XGs) was investigated by using a coupled volume of fluid with the level set approach in CFD (computational fluid dynamics) modelling. The Carreau-Yasuda rheological model was adopted to define the viscous properties of the XGs and the continuum surface force model was used to track the interface between bubble and XGs. Additionally, ANN (artificial neural network) modeling was demonstrated for estimating the outputs of CFD. Our estimated CFD results for different bubble terminal velocities in water and experimental data obtained from the literature showed that there was a maximum relative error of 4.51%. Then, the CFD setup was utilized to investigate the effect of different concentrations of XGs and liquid flow index (N) on bubble rise dynamics within the bubble Reynolds number (Reb) range up to 10.05 and Eotvos number (Eo) range up to 3.47. Significant findings: For a fixed bubble size, the dimensionless bubble terminal velocity decreased in increased flow index and concentration of XGs, which led to decrease Reb and increase Eo. For a given XGs, the dimensionless bubble terminal velocity significantly depends on Reb and Eo. It was found that XGs and flow index significantly affect the distribution of dimensionless liquid viscosity than that of the dimensionless liquid velocity close to the bubble's underneath region. In a comparison with the rheological power-law model, the Carreau-Yasuda model showed to predict more accurate results. The estimated drag coefficient showed a deviation from the empirical equation reported in the literature, in contrast, a more ... |
author2 |
The University of Newcastle. College of Engineering, Science & Environment, School of Engineering |
format |
Article in Journal/Newspaper |
author |
Islam, Md. Tariqul Nguyen, Anh V. Afzal, Asif |
author_facet |
Islam, Md. Tariqul Nguyen, Anh V. Afzal, Asif |
author_sort |
Islam, Md. Tariqul |
title |
Bubble's rise characteristics in shear-thinning xanthan gum solution: a numerical analysis |
title_short |
Bubble's rise characteristics in shear-thinning xanthan gum solution: a numerical analysis |
title_full |
Bubble's rise characteristics in shear-thinning xanthan gum solution: a numerical analysis |
title_fullStr |
Bubble's rise characteristics in shear-thinning xanthan gum solution: a numerical analysis |
title_full_unstemmed |
Bubble's rise characteristics in shear-thinning xanthan gum solution: a numerical analysis |
title_sort |
bubble's rise characteristics in shear-thinning xanthan gum solution: a numerical analysis |
publisher |
Elsevier |
publishDate |
2022 |
url |
http://hdl.handle.net/1959.13/1468124 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
ARC.CE200100009 http://purl.org/au-research/grants/arc/CE200100009 Journal of the Taiwan Institute of Chemical Engineers Vol. 132, Issue March 2022, no. 104219 10.1016/j.jtice.2022.104219 http://hdl.handle.net/1959.13/1468124 uon:48002 ISSN:1876-1070 |
_version_ |
1766068967599767552 |