Numerical simulations on the settling dynamics of an ellipsoidal particle in a viscoelastic fluid

D’Avino, Gaetano

doi:10.1016/j.jnnfm.2022.104947

Cited by 6 publications

(4 citation statements)

References 67 publications

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“…The simulation data with the Giesekus constitutive model are also validated against the results in previous studies [ 37 , 42 ], as shown in Figure 2 b. μ r denotes the ratio of the polymer viscosity to the zero shear viscosity. It shows good agreement between the current simulation results and the literature data.…”

Section: Resultssupporting

confidence: 62%

“…It shows that the shear stress almost increases linearly with the shear strain rate, when the shear strain rate is less than 1 s −1 . It reaches a local maximum and then declines gradually with the increase in the shear strain rate, and it almost increases linearly once The simulation data with the Giesekus constitutive model are also validated against the results in previous studies [37,42], as shown in Figure 2b. µ r denotes the ratio of the polymer viscosity to the zero shear viscosity.…”

Section: The Rheological Properties Of the Constitutive Equationssupporting

confidence: 74%

“… Comparison of the drag coefficients of theory predictions and the literature data [ 37 , 42 ] with the current numerical data: ( a ) VCM model ( G 0 = 0); ( b ) Giesekus model ( Re = 0.01). …”

Section: Figurementioning

confidence: 97%

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Numerical Study on the Unstable Flow Dynamics of Wormlike Micellar Solutions past a Sphere in the Creeping Flow Regime

Wang

Liu

et al. 2023

Polymers

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The flow dynamics of wormlike micellar solutions around a sphere is a fundamental problem in particle-laden complex fluids but is still understood insufficiently. In this study, the flows of the wormlike micellar solution past a sphere in the creeping flow regime are investigated numerically with the two species, micelles scission/reforming, Vasquez–Cook–McKinley (VCM) and the single-species Giesekus constitutive equations. The two constitutive models both exhibit the shear thinning and the extension hardening rheological properties. There exists a region with a high velocity that exceeds the main stream velocity in the wake of the sphere, forming a stretched wake with a large velocity gradient, when the fluids flow past a sphere at very low Reynolds numbers. We found a quasi-periodic fluctuation of the velocity with the time in the wake of the sphere using the Giesekus model, which shows a qualitative similarity with the results found in present and previous numerical simulations with the VCM model. The results indicate that it is the elasticity of the fluid that causes the flow instability at low Reynolds numbers, and the increase in the elasticity enhances the chaos of the velocity fluctuation. This elastic-induced instability might be the reason for the oscillating falling behaviors of a sphere in wormlike micellar solutions in prior experiments.

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Section: Resultssupporting

confidence: 62%

Section: The Rheological Properties Of the Constitutive Equationssupporting

confidence: 74%

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Numerical Study on the Unstable Flow Dynamics of Wormlike Micellar Solutions past a Sphere in the Creeping Flow Regime

Wang

Liu

et al. 2023

Polymers

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“…17 Needless to say, the dynamics of non-spherical particles in flow may strongly differ from the spherical ones, especially when suspended in non-Newtonian liquids. 18–25…”

Section: Introductionmentioning

confidence: 99%

Dynamics of non-spherical particles in viscoelastic fluids flowing in a microchannel

A.,

G.,

P. L.

et al. 2023

Soft Matter

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A review of the roles of constituent minerals and residual bitumen in the solid-liquid separation of oil sands tailings

Wang

Tan

et al. 2023

Journal of Hazardous Materials

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Numerical simulations on the settling dynamics of an ellipsoidal particle in a viscoelastic fluid

Cited by 6 publications

References 67 publications

Numerical Study on the Unstable Flow Dynamics of Wormlike Micellar Solutions past a Sphere in the Creeping Flow Regime

Numerical Study on the Unstable Flow Dynamics of Wormlike Micellar Solutions past a Sphere in the Creeping Flow Regime

Dynamics of non-spherical particles in viscoelastic fluids flowing in a microchannel

A review of the roles of constituent minerals and residual bitumen in the solid-liquid separation of oil sands tailings

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