Numerical determination of bubble size distribution in Newtonian and non-Newtonian fluid flows based on the complete turbulence spectrum

Niño, Lilibeth; Gelves, Ricardo; Ali, Haider; Solsvik, Jannike; Jakobsen, Hugo A.

doi:10.1016/j.ces.2022.117543

Cited by 9 publications

(6 citation statements)

References 35 publications

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“…According to previous studies, the breakage mechanism could be classified into four types 4,5 : turbulent eddy impact, viscous shear stress, shearing shedding, and interface instability. Turbulent eddy impact mechanism was widely studied by many researchers 6–21 . Many models of breakage frequency and DSD were proposed by considering different breakage criteria, 6–12 multiple breakage, 13,14 full energy spectrum, 15–18 and internal flow redistribution 19,20 …”

Section: Introductionmentioning

confidence: 99%

“…Turbulent eddy impact mechanism was widely studied by many researchers 6–21 . Many models of breakage frequency and DSD were proposed by considering different breakage criteria, 6–12 multiple breakage, 13,14 full energy spectrum, 15–18 and internal flow redistribution 19,20 …”

Section: Introductionmentioning

confidence: 99%

“…Turbulent eddy impact mechanism was widely studied by many researchers. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Many models of breakage frequency and DSD were proposed by considering different breakage criteria, [6][7][8][9][10][11][12] multiple breakage, 13,14 full energy spectrum, [15][16][17][18] and internal flow redistribution. 19,20 To verify these models, a large number of experimental data on fluid particle breakage are required.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study on the differences between bubble and drop breakages in agitated turbulent flows

Zhang,

Huang,

et al. 2024

AIChE Journal

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The available experimental data focusing on the differences between bubble and drop breakages are still scarce in the literature. This work conducts the experiments of single bubble and single drop breakages in agitated turbulent flows. The effects of fluid particle size and agitation speed on daughter fragment number, breakage time, breakage probability, breakage frequency, and daughter size distribution (DSD) are analyzed. The breakage frequencies of bubble and drop show the monotonic and non‐monotonic variation trends with increasing fluid particle size, respectively. The variations of bubble and drop DSDs exhibit opposite trends, the probability of equal‐sized breakage of bubble increases while that of drop decreases when agitation speed or fluid particle size increases. These different trends cannot be predicted by most of the existing models simultaneously. The processes of elongation and internal flow redistribution during deformation may be the important factors causing these differences.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental study on the differences between bubble and drop breakages in agitated turbulent flows

Zhang,

Huang,

et al. 2024

AIChE Journal

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“…Bioprocessing requires gas-liquid mass transfer, particularly with non-Newtonian fluids. Nino et al, [9] recorded bubble diameters in a Rushton turbine-stirred bioreactor to numerically compute and experimentally quantify bubble sizes at different axial locations. In Newtonian (water) and non-Newtonian (0.4% CMC) fluids, viscosity affected bubble dispersion calculations.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulations of Chemically Dissipative MHD Mixed Convective Non-Newtonian Nanofluid Stagnation Point Flow over an Inclined Stretching Sheet with Thermal Radiation Effects

Gopinathan. Sumathi. Mini,

Prathi Vijaya Kumar,

Mohammed Ibrahim Shaik

2024

CFDL

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The study of non-Newtonian nanofluid stagnation point flow over an inclined stretching sheet with thermal radiation effects aims to understand how the fluid's non-Newtonian behavior, nanoparticles, the inclined sheet, and thermal radiation affect velocity profiles, temperature distribution, shear stress, and heat transfer rates. It might be used in materials processing, chemical engineering, and energy systems, where understanding fluid behavior in complicated settings is essential for process optimization and system efficiency. The flow problem is reflected in a set of partial differential equations (PDEs) that serve as the governing equations. After appropriate reformatting into Ordinary Differential Equations (ODEs). Mathematica's NDSolve technique is implemented to do a numerical treatment of the dimensionless equations once they have been translated. The upsides of this strategy lie in its ability to automatically track errors and select the best algorithm. Various dimensionless parameters effects on velocity, temperature, and nanoparticle concentration have been studied, and the results are graphically shown. These include the Casson parameter, Brownian motion and thermophoresis, chemical reaction parameter, thermal radiation, viscous dissipation, and mixed convection parameter. The Casson parameter slows down the velocity and speeds up the distributions of temperature and concentration. The skin friction coefficient increases rapidly with increasing tilt and thermophoretic impact amplitudes. The insights were cross-referenced with previous inquiries in order to validate their veracity. All indications are that it complies rigorously and is highly accurate.

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“…Mukhopadhyay et al, [11] used the model of Casson fluid to examine how a non-Newtonian fluid behaved in an unstable twodimensional flow on a stretching surface with a particular surface temperature. The primary objective of Nino et al, [12] was to numerically determine and experimentally compare the diameters of bubbles at various axial positions of a bioreactor being churned by a Rushton turbine. The effects of viscosity on modelling bubble dispersion in a Newtonian fluid (water) and their comparison to a non-Newtonian fluid (0.4% CMC) were particularly highlighted.…”

Section: Introductionmentioning

confidence: 99%

Impact on Casson Nanofluid Flow Across an Inclined, Slanted Surface by Radiation, Energy and Mass Transfer

Sumathi Mini Gopinathan,

Prathi Vijaya Kumar,

Shaik Mohammed Ibrahim

et al. 2023

ARFMTS

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Casson nanofluid flow across a porous, slanted surface is investigated. In addition to the impact of a heat source, thermal energy, and a chemical reaction also are considered. Applying similarity transformations, the controlling nonlinear PDEs are converted to ODEs. To resolve the ordinary differential equations (ODEs), we used the universal numerical differential equation solver Wolfram Language function NDSolve. The distributions under heat source are affected by chemical processes and other variables are explored. While liquid velocity reduced due to inclination and the Casson factor, mass and energy transit rates rose. The findings are represented graphically and are consistent with past research. The findings would provide valuable insights into the flow patterns, temperature distribution, and concentration profiles within the system. This information can be crucial for designing and optimizing heat transfer systems, energy-efficient processes, and catalytic reactors involving Casson nanofluids and porous media.

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Numerical determination of bubble size distribution in Newtonian and non-Newtonian fluid flows based on the complete turbulence spectrum

Cited by 9 publications

References 35 publications

Experimental study on the differences between bubble and drop breakages in agitated turbulent flows

Experimental study on the differences between bubble and drop breakages in agitated turbulent flows

Numerical Simulations of Chemically Dissipative MHD Mixed Convective Non-Newtonian Nanofluid Stagnation Point Flow over an Inclined Stretching Sheet with Thermal Radiation Effects

Impact on Casson Nanofluid Flow Across an Inclined, Slanted Surface by Radiation, Energy and Mass Transfer

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