Journal ArticleDOI
On the bubble formation under mixed injection conditions from a vertical needle
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TLDR
In this paper, an analytical and experimental study of the formation of bubbles from a submerged vertical needle under mixed injection conditions, where neither the gas flow rate nor the feeding pressure remain constant during the process, is presented.About:
This article is published in International Journal of Multiphase Flow.The article was published on 2017-12-01. It has received 11 citations till now. The article focuses on the topics: Liquid bubble & Bubble.read more
Citations
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Journal ArticleDOI
Experimental investigation on the bubble formation from needles with and without liquid co-flow
TL;DR: In this article, the authors report experiments on bubble formation from needles with and without liquid co-flow, carried out with needles in the range of 0.79 d n 2.06 ´mm, for gas flow rates up to 4.5 ´cm3/s per needle, and with liquid co flow velocities up to 0.4 ´m/s.
Journal ArticleDOI
Bubble formation from sub-millimeter orifices under variable gas flow conditions
TL;DR: In this paper, the authors provided an experimental investigation on the mechanism of bubble formation from sub-millimeter orifices under variable gas flow conditions VGFC and investigated the effect of influential parameters including the volumetric gas flow rate Q, the orifice diameter d or, and the volume of the gas reservoir V c upstream of the bubble orifice.
Journal ArticleDOI
Continuous formation of microbubbles during partial coalescence of bubbles from a submerged capillary nozzle
TL;DR: In this paper, a scaling law for microbubbles size is proposed as a function of Weber and Bond numbers, and a bubble regime map is given to identify the critical conditions for the formation of micro-bubbles.
DissertationDOI
Computational fluid dynamics multiscale modelling of bubbly flow. A critical study and new developments on volume of fluid, discrete element and two-fluid methods
TL;DR: In this paper, an open-source simulation framework has been designed and developed using the OpenFOAM library to analyze the cases from micro-scale to macro-scale levels of bubbles.
References
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Journal ArticleDOI
Bubble Formation and Bubble Rise Velocity in Gas−Liquid Systems: A Review
Abstract: The formation of gas bubbles and their subsequent rise due to buoyancy are very important fundamental phenomena that contribute significantly to the hydrodynamics in gas−liquid reactors. The rise o...
Journal ArticleDOI
Dynamics of bubble growth and detachment from a needle
Hasan N. Oguz,Andrea Prosperetti +1 more
TL;DR: In this article, the authors considered the growth and departure of bubbles from a submerged needle and showed the existence of two different growth regimes according to whether the gas flow rate into the bubble is smaller or greater than a critical value.
Book ChapterDOI
The Formation of Bubbles and Drops
R. Kumar,N.K. Kuloor +1 more
TL;DR: In this paper, the authors describe the single bubble formation at isolated nozzles both under constant flow and constant pressure conditions, though considerable work still needs to be done in the intermediate region where bubble size is highly influenced by resonance effects.
Journal ArticleDOI
Experiments on bubble pinch-off
TL;DR: In this article, the authors used ultra-high-speed video imaging, at frame-rates up to 1 million fps, to study the dynamics and shape of the pinch-off neck region.
Related Papers (5)
Bubble formation during horizontal gas injection into downward flowing liquid
Hua Bai,Brian G. Thomas +1 more