A model for rising bubbles interacting with crossflowing liquid

Aliyu, Aliyu M., Seo, Hyunduk, Xu, Yang , Wang, Jin-Jun and Kim, Kyung Chun (2018) A model for rising bubbles interacting with crossflowing liquid. International Journal of Multiphase Flow, 108 . pp. 94-104. ISSN 0301-9322

Full content URL: https://doi.org/10.1016/j.ijmultiphaseflow.2018.07...

A model for rising bubbles interacting with crossflowing liquid
Author's accepted manuscript
2018 Aliyu et al. Manuscript accepted.docx.pdf - Whole Document
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Item Type:Article
Item Status:Live Archive


The effect of liquid crossflow on the behaviour of submerged bubbles was examined using a theoretical time-varying model based on the equations of motion in two-dimensional space. The results were compared with experimental rise velocities and previously obtained trajectories. Bubble images were recorded using high-speed photography at gas flow rates of 2–25 L/min and crossflow velocities of 0.059–0.334 m/s, respectively. Image processing was then used to measure the bubble rise velocities. Increasing the crossflows strongly limits the bubble rise velocities, which depend on the bubble size, especially at high crossflow velocities. The model's predicted velocities show good agreement with the experimental data, which had uncertainties of around ±10%. The model predicted nearly linear trajectories, which were visually similar to the experimental trajectories. We compared the model's trajectories with swarm centroids and predictions by an empirical correlation developed earlier for the swarm inclination angle. The model's results compared favourably with the experiments, although there were slight overpredictions, especially at high crossflows. This could be corrected in future works by developing more appropriate closure relationships related to crossflows.

Keywords:Bubbly flow, Bubble swarms, Bubble trajectory, Liquid crossflow, force balance
Subjects:H Engineering > H141 Fluid Mechanics
H Engineering > H800 Chemical, Process and Energy Engineering
H Engineering > H810 Chemical Engineering
H Engineering > H300 Mechanical Engineering
Divisions:College of Science > School of Engineering
ID Code:48008
Deposited On:15 Feb 2023 12:17

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