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1 PublicationBubble formation from sub-millimeter orifices: experimental analysis and modeling
Mohseni, E.; Chiamulera, M.; Reinecke, S.; Hampel, U.
We developed a theoretical model that estimates the bubble size from sub-millimeter orifices under variable gas flow conditions. The model is successfully tested for orifices with diameters in the range of 0.2 mm to 1 mm under both quasi-static and dynamic bubbling regimes. The model is able to predict the final bubble radius with an accuracy better than 20% compared with the experimental results. Moreover, we explicitly look into the influence of the gas reservoir volume V_c upstream of the orifice on the gas reservoir pressure P_c by simultaneously monitoring the events, i.e. changes in the state of bubble, upstream and downstream of orifices. We found that, variations in P_c reduce as V_c increases. Analysis of the dynamics of the dominating forces acting on a bubble show that, enlarging V_c mainly amplifies the gas momentum force and the liquid inertia force. Hence, the bubble detachment mechanism may no longer be only buoyancy driven.
Keywords: Bubble formation; Sub-millimeter orifice; Gas reservoir; Bubble dynamics; Modeling
Involved research facilities
- TOPFLOW Facility
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Data for: Bubble formation from sub-millimeter orifices: experimental analysis …
ROBIS: 33261 HZDR-primary research data are used by this (Id 33258) publication
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Chemical Engineering and Processing: Process Intensification 173(2022), 108809
DOI: 10.1016/j.cep.2022.108809
Cited 2 times in Scopus
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