A model for rising bubbles interacting with crossflowing liquid. (November 2018)
- Record Type:
- Journal Article
- Title:
- A model for rising bubbles interacting with crossflowing liquid. (November 2018)
- Main Title:
- A model for rising bubbles interacting with crossflowing liquid
- Authors:
- Aliyu, Aliyu M.
Seo, Hyunduk
Xu, Yang
Wang, Jin-Jun
Kim, Kyung Chun - Abstract:
- Highlights: A dynamic model is written for submerged bubbles interacting with liquid crossflow. Correlations for drag coefficient and bubble expansion used closure relationships. Experimental data provided initial conditions as well as validation for model solutions. Predicted rise velocities closely agree with the experimental values. Bubble trajectories well predicted especially at low to medium crossflow velocities. Abstract: 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 favourablyHighlights: A dynamic model is written for submerged bubbles interacting with liquid crossflow. Correlations for drag coefficient and bubble expansion used closure relationships. Experimental data provided initial conditions as well as validation for model solutions. Predicted rise velocities closely agree with the experimental values. Bubble trajectories well predicted especially at low to medium crossflow velocities. Abstract: 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. Graphical abstract: … (more)
- Is Part Of:
- International journal of multiphase flow. Volume 108(2018)
- Journal:
- International journal of multiphase flow
- Issue:
- Volume 108(2018)
- Issue Display:
- Volume 108, Issue 2018 (2018)
- Year:
- 2018
- Volume:
- 108
- Issue:
- 2018
- Issue Sort Value:
- 2018-0108-2018-0000
- Page Start:
- 94
- Page End:
- 104
- Publication Date:
- 2018-11
- Subjects:
- Bubbly flow -- Bubble swarms -- Bubble trajectory -- Force balance -- Liquid crossflow
Multiphase flow -- Periodicals
Écoulement polyphasique -- Périodiques
Multiphase flow
Periodicals
620.1064 - Journal URLs:
- http://www.sciencedirect.com/science/journal/03019322 ↗
http://www.elsevier.com/journals ↗ - DOI:
- 10.1016/j.ijmultiphaseflow.2018.07.002 ↗
- Languages:
- English
- ISSNs:
- 0301-9322
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 4542.366000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 7476.xml