Numerical study on the flow of high viscous fluids out of conical vessels under low-frequency vibration

Zhan, Xueying; Shen, Baojun; Sun, Zhuang; He, Yu; Shi, Tielin; Li, Xiwen

doi:10.1016/j.cherd.2018.01.007

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…The mixing processes are described through the species transport model and the laminar model. The iteration time step, which is usually 1 × 10 −4 s and can be increased at discretion, is determined based on the vibration frequency, and an increased resolution is found to have no significant effects on the predicted flow field …”

Section: Problem Formulationmentioning

confidence: 87%

Characterization of fluid mixing in a closed container under horizontal vibrations

Zhan

Sun

et al. 2019

Can J Chem Eng

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The mixing characteristics of two initially stratified miscible fluids in a closed container vibrated horizontally are studied numerically by a validated computational fluid dynamics model. The flow characteristics and interfacial dynamics in the closed vibrating container are analyzed, and the effects of vibration parameters and gravity on mixing efficiency are evaluated both quantitatively and qualitatively. The results show that interfacial instability occurs in the closed container, which leads to interfacial deformation and breakup and quickens mixing. Two distinct stages of the mixing process can be observed in the closed vibrating container. During the macro‐mixing, an increasingly sharp gradient of the concentration field is generated. During the micro‐mixing, the mixing process is dominated by the diffusion of the concentration field and ends up with a nearly homogeneous mixture. The intensification of mixing process by vibration is most pronounced in the absence of static gravity. The gravity can suppress the interfacial instability and retard the mixing process. Over the range of conditions investigated in this paper, vibration is an efficient approach for mixing miscible liquids in a closed container.

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Section: Problem Formulationmentioning

confidence: 87%

Characterization of fluid mixing in a closed container under horizontal vibrations

Zhan

Sun

et al. 2019

Can J Chem Eng

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“…Computational fluid dynamics (CFD) is commonly used for investigating the fluid flow and hydrodynamics of mixing systems. 36,37 Numerous studies have focused on fluid flow in various agitated mixers for non-Newtonian fluids using the CFD method. [38][39][40][41] Rudolph et al 42 employed CFD to simulate the flow field in a coaxial mixer and obtained a single master power curve.…”

Section: Introductionmentioning

confidence: 99%

“…Computational fluid dynamics (CFD) is commonly used for investigating the fluid flow and hydrodynamics of mixing systems 36,37 . Numerous studies have focused on fluid flow in various agitated mixers for non‐Newtonian fluids using the CFD method 38–41 .…”

Section: Introductionmentioning

confidence: 99%

Study of hydrodynamics and flow characteristics in a twin‐blade planetary mixer with non‐Newtonian fluids

et al. 2022

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This study aims to characterize the hydrodynamics and flow characteristics in a twin‐blade planetary mixer with non‐Newtonian fluids by using CFD modeling technique. The kneading pressure was recorded using an experimental setup, and a CFD model was verified. The flow characteristics and hydrodynamics in the mixing vessel containing the power‐law fluids were analyzed quantitatively, particularly the influence of the flow behavior index n. Results revealed that as n increased from 0.25 to 1.75, the maximum shear rate decreased from 733 to 120 s−1 and the local apparent viscosity in the kneading regions increased significantly. The maximum kneading pressure and power consumption increased almost exponentially with increasing n. The correlation for the kneading pressure and the correlation for the power consumption were established by introducing the pressure‐oriented effective viscosity μe‐p, the pressure‐oriented effective shear rate trueγ̇e−p, the improved effective viscosity μei and the improved effective shear rate trueγ̇italicei.

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Modeling the effects of external oscillations on mucus clearance in obstructed airways

Hamida El Naser,

Karayel

2023

Biomech Model Mechanobiol

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Numerical study on the flow of high viscous fluids out of conical vessels under low-frequency vibration

Cited by 4 publications

References 22 publications

Characterization of fluid mixing in a closed container under horizontal vibrations

Characterization of fluid mixing in a closed container under horizontal vibrations

Study of hydrodynamics and flow characteristics in a twin‐blade planetary mixer with non‐Newtonian fluids

Modeling the effects of external oscillations on mucus clearance in obstructed airways

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