The lateral migration of relative large bubble in simple shear flow in water

Li, Zhongchun; Song, Xiaoming; Jiang, Shengyao; Ishii, Mamoru

doi:10.1016/j.expthermflusci.2016.04.013

Cited by 11 publications

(3 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ratios of the zigzag-path amplitude to the bubble equivalent diameter in air–water systems from experiments ,,,, are collected in Figure . An exponential function defined as A / d eq = 5.692 exp(−0.8485 d eq ) + 0.2722 with a standard deviation of 0.109 was adopted to fit the evolution of the amplitude with the increasing bubble size, which gives an amplitude of 0.46 d eq for the bubble with d eq = 4 mm, as shown in Figure .…”

Section: Mathematical Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation of Bubbly Flow Using Partially Averaged Navier–Stokes Simulation and a Path Oscillation Model in the Euler–Lagrange Approach

Zhou

Zhao

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Large bubbles always undergo asymmetric paths due to the wake instability, which was rarely considered in the simulation of bubbly flow in complex flow systems such as bubble columns. Here, we propose a bubble path oscillation model considering the zigzag lateral motion caused by the periodic vortex shedding, which is added into the rectilinear bubble motion model in the Lagrange frame. This model is further adopted to simulate the flow of 4 mm bubbles with 680 < Re < 1000 in bubble columns, with the liquid flow predicted by the partially averaged Navier−Stokes model in the Euler frame. A parameter analysis is conducted by comparing the simulation results with the existing experimental data to determine the optimal oscillation amplitude of the path. The effects of oscillation amplitude on the bubble distribution, gas holdup, and flow field are further discussed. Our findings may contribute to the fundamental understanding and accurate simulation of bubbly flow.

show abstract

Section: Mathematical Modelsmentioning

confidence: 99%

“…Ratio of the path amplitude to the bubble equivalent diameter collected from the experimental data. Li et al, 2016a and 2016b represent refs and , respectively.…”

Section: Mathematical Modelsmentioning

confidence: 99%

Numerical Simulation of Bubbly Flow Using Partially Averaged Navier–Stokes Simulation and a Path Oscillation Model in the Euler–Lagrange Approach

Zhou

Zhao

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Knowledge on the lift force acting on a bubble moving in liquid is of great importance to predict distributions of the gas volume fraction (void fraction) in bubbly flows. There have therefore been many studies on the lift force by means of theoretical analyses, experiments and numerical simulations (Adoua et al, 2009;Aoyama et al, 2017;Auton, 1987;Auton et al, 1988;Bothe et al, 2006;Dijkhuizen et al, 2010;Ervin and Tryggvason, 1997;Hessenkemper et al, 2020;Lee and Lee, 2020;Legendre andMagnaudet, 1997, 1998;Li et al, 2016;Tomiyama, 1998;Tomiyama et al, 2002b;Žun, 1980;Ziegenhein et al, 2018). The lift coefficient, C L , of a deformed bubble in a linear shear flow is known to be either positive or negative, and the critical bubble diameter, d C , for the change in the sign, i.e.…”

Section: Introductionmentioning

confidence: 99%

Critical Diameter for Lift Reversal of Bubbles in Linear Shear Flows

et al. 2021

View full text Add to dashboard Cite

The lift coefficient C L of a bubble in a shear flow is known to change its sign depending on the bubble shape, i.e. C L of spherical bubbles are positive for any bubble Reynolds numbers while those of ellipsoidal bubbles can be negative due to the deformation-induced negative lift. The critical bubble diameter, d C , for the lift reversal was discussed in this study by making use of available C L correlations for clean bubbles in linear shear flows. As a result, the following conclusions were obtained:(1) the C L correlations well describe the complex characteristics of d C and the lift reversal criterion in terms of Re C is well reproduced with the correlations, (2) in the surface tension and inertial force dominant regime, the critical Eötvös and Weber numbers can be used to develop a simple criterion of lift reversal, i.e. they are almost constant, and the capillary number for d C can be expressed in terms of the Morton number only, M ; these dimensionless groups in the viscous force dominant regime however show more complex dependence on M , and (3) the critical Ohnesorge number, Oh C , monotonically increases with increasing M even in the viscous force dominant regime. Therefore a tentative d C correlation based on Oh C was developed.

show abstract