Behavior of a single coherent gas bubble chain and surrounding liquid jet flow structure

Sanada, Toshiyuki; Watanabe, Masao; Fukano, Tohru; Kariyasaki, Akira

doi:10.1016/j.ces.2005.04.010

Cited by 49 publications

(19 citation statements)

References 20 publications

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“…In the paper [20] it has been shown that bubbles rise in approximately identical trajectories up to the distance less than 40 mm from the nozzle outlet. In the experiment d e was in the range of 0.66-2.0 mm The distance of bubble trajectories from the vertical axis increases together with the increase of bubble departure frequency.…”

Section: Previous Workmentioning

confidence: 97%

Multifractal properties of large bubble paths in a single bubble column

Mosdorf¹,

Wyszkowski²,

Dąbrowski³

2011

Archives of Thermodynamics

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In the paper the paths of bubbles emitted from the brass nozzle with inner diameter equal to 1.6 mm have been analyzed. The mean frequency of bubble departure was in the range from 2 to 65.1 Hz. Bubble paths have been recorded using a high speed camera. The image analysis technique has been used to obtain the bubble paths for different mean frequencies of bubble departures. The multifractal analysis (WTMM -wavelet transform modulus maxima methodology) has been used to investigate the properties of bubble paths. It has been shown that bubble paths are the multifractals and the influence of previously departing bubbles on bubble trajectory is significant for bubble departure frequency f b > 30 Hz.

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Section: Previous Workmentioning

confidence: 97%

Multifractal properties of large bubble paths in a single bubble column

Mosdorf¹,

Wyszkowski²,

Dąbrowski³

2011

Archives of Thermodynamics

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“…Zaruba and Krepper et al have used high-speed video observation to make study on bubble motion in a rectangular column and an individual bubble in the gas swarm could be tracked [3]. Sanada and Watanabe et al used a high-speed digital video camera and an analog single-lens-reflex camera to investigate bubble trajectories and the surrounding water flow fields in the state of bubbles rising in a chain [4]. Both the case of low bubble production frequency and high bubble production frequency have been experimentally studied.…”

Section: Introductionmentioning

confidence: 98%

Geometric method for bubble volume computing based on high-speed image

Wang

Dong

2009

2009 IEEE Intrumentation and Measurement Technology Conference

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A geometric method of bubble volume computing based on 2-D high-speed image were introduced in this paper. An ellipsoid was constructed with three semi-axis extracted from bubble image. The volume of ellipsoid is approximately equal to the size of bubble. Correction methods are also described for error reducing. The feasibility and universal applicability of the geometric method have been verified by volume contrast and standard deviation analysis. Finally, gas volume fraction in twophase flow can be calculated.

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“…Experimental research by Katz and Meneveau (1996), however, was not in agreement with these predictions, showing that pairs of small bubbles tend to collide and coalesce instead. Experiments by Sanada et al (2005) have revealed the presence of an equilibrium distance. However, in their study, the equilibrium distance was not stable and larger than predicted by the previous studies.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic interaction of bubbles rising side-by-side in viscous liquids

et al. 2019

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Detailed experiments are conducted to study hydrodynamic effects of two simultaneously released bubbles rising in viscous liquids. Different types of interactions are observed as a function of the liquid viscosities, leading to different bubble shapes, ranging from rigid spheres and spheroids to deformable spheroids. Bubble velocities are obtained by an automated smooth spline technique, which allows for an accurate calculation of the lift and drag forces. The results obtained for spherical bubbles are in agreement with predictions of Legendre et al. (J Fluid Mech 497:133-166, 2003). The observations of deformed bubbles show that a very small equilibrium distance can be established due to the induced torque arising from the deformation. In terms of the lateral interaction, different separation distances can be observed depending on the initial distance. For deformable bubbles, the results are limited to a qualitative analysis due to limitations of the processing technique to handle strong shape irregularities. Nevertheless, the observations reveal that the deformation plays an important role with respect to bubble interactions and path instability of which the latter can be triggered by the presence of other bubbles. Graphic abstract List of symbols

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Behavior of a single coherent gas bubble chain and surrounding liquid jet flow structure

Cited by 49 publications

References 20 publications

Multifractal properties of large bubble paths in a single bubble column

Multifractal properties of large bubble paths in a single bubble column

Geometric method for bubble volume computing based on high-speed image

Hydrodynamic interaction of bubbles rising side-by-side in viscous liquids

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