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Experimental observations of bubbling regimes at in-line multi-orifice bubblers

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Experimental observations of bubbling regimes at in-line multi-orifice bubblers. / Capponi, Antonio; Llewellin, Edward W.
In: International Journal of Multiphase Flow, Vol. 114, 31.05.2019, p. 66-81.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Capponi, A & Llewellin, EW 2019, 'Experimental observations of bubbling regimes at in-line multi-orifice bubblers', International Journal of Multiphase Flow, vol. 114, pp. 66-81. https://doi.org/10.1016/j.ijmultiphaseflow.2019.02.008

APA

Capponi, A., & Llewellin, E. W. (2019). Experimental observations of bubbling regimes at in-line multi-orifice bubblers. International Journal of Multiphase Flow, 114, 66-81. https://doi.org/10.1016/j.ijmultiphaseflow.2019.02.008

Vancouver

Capponi A, Llewellin EW. Experimental observations of bubbling regimes at in-line multi-orifice bubblers. International Journal of Multiphase Flow. 2019 May 31;114:66-81. Epub 2019 Feb 22. doi: 10.1016/j.ijmultiphaseflow.2019.02.008

Author

Capponi, Antonio ; Llewellin, Edward W. / Experimental observations of bubbling regimes at in-line multi-orifice bubblers. In: International Journal of Multiphase Flow. 2019 ; Vol. 114. pp. 66-81.

Bibtex

@article{76ef2c4705484910a980c7259ddab062,
title = "Experimental observations of bubbling regimes at in-line multi-orifice bubblers",
abstract = "Bubble formation and bubbling regimes are well-characterized for the cases of single-orifice bubblers and industrial perforated plates. However, bubbling regimes from bubblers with multiple in-line orifices remain poorly described. Here, we investigate the dynamics of bubble formation at both single-orifice and multi-orifice bubblers, with one, three, five and nine in-line orifices in an 80-cm-long bubbler. We use high-speed videography and image processing to identify the effects of bubbler volume, and the number, spacing, and diameter of orifices, on bubbling regimes, bubble period, and bubble formation time. We identify five main bubbling regimes based on synchronization among orifices, and discuss the parameters affecting the bubbling dynamics. Decreasing bubbler volume leads to a decrease in bubble volume and bubble period, and enhances synchronization. Increasing orifice diameter leads to an increase in bubble volume and enhances synchronization. Spacing between orifices doesn't play an important role in determining the bubbling regime. Based on the experimental observations, we develop new bubbling regime maps constructed using the dimensionless Capacitance number and Weber number.",
keywords = "Bubble formation, Bubble formation time, Bubble period, Gas sparger, Multi-orifice, Submerged orifices",
author = "Antonio Capponi and Llewellin, {Edward W.}",
year = "2019",
month = may,
day = "31",
doi = "10.1016/j.ijmultiphaseflow.2019.02.008",
language = "English",
volume = "114",
pages = "66--81",
journal = "International Journal of Multiphase Flow",
issn = "0301-9322",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Experimental observations of bubbling regimes at in-line multi-orifice bubblers

AU - Capponi, Antonio

AU - Llewellin, Edward W.

PY - 2019/5/31

Y1 - 2019/5/31

N2 - Bubble formation and bubbling regimes are well-characterized for the cases of single-orifice bubblers and industrial perforated plates. However, bubbling regimes from bubblers with multiple in-line orifices remain poorly described. Here, we investigate the dynamics of bubble formation at both single-orifice and multi-orifice bubblers, with one, three, five and nine in-line orifices in an 80-cm-long bubbler. We use high-speed videography and image processing to identify the effects of bubbler volume, and the number, spacing, and diameter of orifices, on bubbling regimes, bubble period, and bubble formation time. We identify five main bubbling regimes based on synchronization among orifices, and discuss the parameters affecting the bubbling dynamics. Decreasing bubbler volume leads to a decrease in bubble volume and bubble period, and enhances synchronization. Increasing orifice diameter leads to an increase in bubble volume and enhances synchronization. Spacing between orifices doesn't play an important role in determining the bubbling regime. Based on the experimental observations, we develop new bubbling regime maps constructed using the dimensionless Capacitance number and Weber number.

AB - Bubble formation and bubbling regimes are well-characterized for the cases of single-orifice bubblers and industrial perforated plates. However, bubbling regimes from bubblers with multiple in-line orifices remain poorly described. Here, we investigate the dynamics of bubble formation at both single-orifice and multi-orifice bubblers, with one, three, five and nine in-line orifices in an 80-cm-long bubbler. We use high-speed videography and image processing to identify the effects of bubbler volume, and the number, spacing, and diameter of orifices, on bubbling regimes, bubble period, and bubble formation time. We identify five main bubbling regimes based on synchronization among orifices, and discuss the parameters affecting the bubbling dynamics. Decreasing bubbler volume leads to a decrease in bubble volume and bubble period, and enhances synchronization. Increasing orifice diameter leads to an increase in bubble volume and enhances synchronization. Spacing between orifices doesn't play an important role in determining the bubbling regime. Based on the experimental observations, we develop new bubbling regime maps constructed using the dimensionless Capacitance number and Weber number.

KW - Bubble formation

KW - Bubble formation time

KW - Bubble period

KW - Gas sparger

KW - Multi-orifice

KW - Submerged orifices

U2 - 10.1016/j.ijmultiphaseflow.2019.02.008

DO - 10.1016/j.ijmultiphaseflow.2019.02.008

M3 - Journal article

AN - SCOPUS:85062155071

VL - 114

SP - 66

EP - 81

JO - International Journal of Multiphase Flow

JF - International Journal of Multiphase Flow

SN - 0301-9322

ER -