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Bubble formation under constant flow rate

Löwe, Jens-Michael and Roisman, Ilia V. (2015):
Bubble formation under constant flow rate.
Tainan, Taiwan, In: ICLASS 2015, 13th Triennial International Conference on Liquid Atomization and Spray Systems, Tainan, Taiwan, 23.-27. August 2015, [Conference or Workshop Item]

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Abstract

The generation of bubbles caused by inserting a gas stream into a liquid is a common area of research because it occurs in many technical applications for example in cooling systems of nuclear reactors, water oxygenation or other chemical procedures. Therefore, the prediction of the size as well as the time of bubble dev elopment in dependence on the flow rate and the diameter of the orifice is very important for prediction and optimization of different processes. In this study an analytical model of the bubble formation for a constant flow rate is developed. The focus of the investigation is the periodic formation of single bubbles. Thereby the non - spherical shape of the bubble is calculated using the Young - Laplace equation. Based on the shape of the bubble and the boundary conditions the departure volume, and the time of bubble formation until the departure are calculated. The developed model is verified by a comparison with existing experimental data from the literature. The agreement between the theoret ical predictions and the experimental data is rather good.

Item Type: Conference or Workshop Item
Erschienen: 2015
Creators: Löwe, Jens-Michael and Roisman, Ilia V.
Title: Bubble formation under constant flow rate
Language: English
Abstract:

The generation of bubbles caused by inserting a gas stream into a liquid is a common area of research because it occurs in many technical applications for example in cooling systems of nuclear reactors, water oxygenation or other chemical procedures. Therefore, the prediction of the size as well as the time of bubble dev elopment in dependence on the flow rate and the diameter of the orifice is very important for prediction and optimization of different processes. In this study an analytical model of the bubble formation for a constant flow rate is developed. The focus of the investigation is the periodic formation of single bubbles. Thereby the non - spherical shape of the bubble is calculated using the Young - Laplace equation. Based on the shape of the bubble and the boundary conditions the departure volume, and the time of bubble formation until the departure are calculated. The developed model is verified by a comparison with existing experimental data from the literature. The agreement between the theoret ical predictions and the experimental data is rather good.

Place of Publication: Tainan, Taiwan
Uncontrolled Keywords: bubble formation, bubble size, bubble volume, formation time
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA)
DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Transregios
DFG-Collaborative Research Centres (incl. Transregio) > Transregios > TRR 75 Droplet Dynamics Under Extreme Ambient Conditions
Event Title: ICLASS 2015, 13th Triennial International Conference on Liquid Atomization and Spray Systems
Event Location: Tainan, Taiwan
Event Dates: 23.-27. August 2015
Date Deposited: 28 Oct 2016 10:21
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