Effect of surfactants on hydrodynamics characteristics of bubble in shear thinning fluids at low Reynolds number

Li, Shaobai; Fan, Jungeng; Li, Rundong; Wang, Lei; Luan, Jingde

doi:10.1007/s11771-018-3785-9

Cited by 7 publications

(5 citation statements)

References 26 publications

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“…The simulated results of example 6 in Table were compared with the experimental results under slightly different conditions ( d = 2 mm, k = 5.1 Pa·s n , n = 0.68, τ 0 = 2.9 Pa). The experimental device and the method were described in our previous work . Notably, the simulation results were in good agreement with the experimental results in Figure , which proved the accuracy of the simulation method.…”

Section: Test Of Modelsupporting

confidence: 77%

“…The experimental device and the method were described in our previous work. 25 Notably, the simulation results were in good agreement with the experimental results in Figure 7 , which proved the accuracy of the simulation method. It could be seen that the bubble formation was principally divided into two stages, expansion and stretching, which was similar to the simulation results.…”

Section: Test Of Modelsupporting

confidence: 74%

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Bubble Formation in Yield-Stress Fluids Using a Coupled Level-Set and Volume-of-Fluid Method

Cao

Bai

et al. 2020

ACS Omega

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The bubble formation under the influence of orifice diameter submerged in yield-stress fluids was studied numerically using a coupled level-set (LS) and the volume-of-fluid (VOF) method and was in contrast with that seen in Newtonian fluids. The bubble formation process had a good consistency by virtue of comparing numerical simulation and experiment. The process of bubble formation could be divided into two parts, bubble expansion stage and stretch stage. The influence of orifice diameter and liquid rheological characteristics (consistency coefficient, flow index, and yield stress) on the bubble formation parameters (the bubble formation time, detachment volume, and aspect ratio) was investigated. The results revealed that the bubble detachment volume increases with the increase of orifice diameter, consistency coefficient, flow index, and yield stress. In different kinds of fluids, the formation time and detachment volume of bubbles in the shear-thinning fluid were the lowest, followed by the Newtonian fluid, and finally, in yield-stress fluids.

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Section: Test Of Modelsupporting

confidence: 77%

Section: Test Of Modelsupporting

confidence: 74%

Bubble Formation in Yield-Stress Fluids Using a Coupled Level-Set and Volume-of-Fluid Method

Cao

Bai

et al. 2020

ACS Omega

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“…The pressure outlet boundary condition is employed at the top of the computational domain. The pressure is fixed as follows = p 0 (35) The time step Δt is 1 × 10 −3 . In this paper, the triangle mesh is used and the size is set to 0.5 mm, which could ensure the accuracy of bubble motion simulation according to our previous examination (Table 1).…”

Section: ■ Conclusionmentioning

confidence: 99%

“…In this paper, the triangle mesh is used and the size is set to 0.5 mm, which could ensure the accuracy of bubble motion simulation according to our previous examination (Table 1). 35 Experiment and Model Validation. Validation of the simulation is carried out through a comparison of the experimental and simulated results, which are presented in…”

Section: ■ Conclusionmentioning

confidence: 99%

Numerical Simulation of Mass-Transfer Characteristics of a Bubble Rising in Yield Stress Fluids

et al. 2020

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The mass-transfer characteristics of bubbles rising in yield stress fluids was investigated numerically using volume-of-fluid and user-defined function methods in this study. The CO 2 concentration profiles inside the liquid phase near the bubble equator at different bubble diameters, yield stresses, consistency coefficients, and flow indices were observed. The results revealed that the rate of mass transfer decreased with the increase of yield stress, consistency coefficient, and flow index of the liquid phase and the decrease of bubble diameter. Moreover, two empirical correlations for the drag coefficients and Sherwood numbers were developed by introducing one correction factor X for C D correlation and another correction factor f c for Sherwood numbers for correcting the influence of yield stress behavior on bubble motion and mass transfer, respectively. The predictions of the two correlations were compared with the simulated data, and a satisfactory agreement was found.

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“…Size and shape [6,[9][10][11] and trajectory [12,13] of the ascent of a single bubble change at addition of surfactant in liquid. tarting from a certain limiting value of the surfactant concentration in the liquid the bubble takes a teardrop shape with the formation of a «tail» in the rear part of the bubble [6] in the range of small Reynolds numbers Re0 < 1; in this case, the formation of the tail occurs gradually as the distance traveled by the bubble increases.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of effect of the surfactant type on dynamics of monodispersed bubble cluster rising in a viscous liquid

Arkhipov,

Usanina,

Churkin

2023

E3S Web Conf.

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The results of an experimental study of the process of contact ascent of the air monodispersed bubble cluster in the presence of surfactant in the range of Reynolds numbers Re < 0.2 are presented. New experimental data on the general picture of the contact ascent of the monodispersed bubble cluster in the presence of surfactant have been obtained. The effect of the nature of the surfactant on the overall picture of ascent, velocity and drag coefficient of the monodispersed bubble cluster has been analyzed.

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Effect of surfactants on hydrodynamics characteristics of bubble in shear thinning fluids at low Reynolds number

Cited by 7 publications

References 26 publications

Bubble Formation in Yield-Stress Fluids Using a Coupled Level-Set and Volume-of-Fluid Method

Bubble Formation in Yield-Stress Fluids Using a Coupled Level-Set and Volume-of-Fluid Method

Numerical Simulation of Mass-Transfer Characteristics of a Bubble Rising in Yield Stress Fluids

Experimental study of effect of the surfactant type on dynamics of monodispersed bubble cluster rising in a viscous liquid

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