Numerical study of hydrodynamic and thermal behaviors of agitated yield-stress fluid

Hammami, Moez; Chebbi, Amal; Baccar, Mounir

doi:10.1051/meca/2013070

Cited by 5 publications

(2 citation statements)

References 13 publications

(20 reference statements)

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“…Similar outcomes have been remarks in previous analyses where the thermic and hydrodynamical behaviors were investigated using 2-D numerical studies by Refs. 15,[29][30][31] and in the 3-D simulation probed by Pedrosa et al 32 and Gammoudi et al 33 .…”

Section: Resultsmentioning

confidence: 99%

Investigation of mixing viscoplastic fluid with a modified anchor impeller inside a cylindrical stirred vessel using Casson–Papanastasiou model

Benhanifia

Redouane

Rahmani

et al. 2022

Sci Rep

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In process engineering as chemical and biotechnological industry, agitated vessels are commonly used for various applications; mechanical agitation and mixing are performed to enhance heat transfer and improve specific Physico-chemical characteristics inside a heated tank. The research subject of this work is a numerical investigation of the thermo-hydrodynamic behavior of viscoplastic fluid (Casson–Papanastasiou model) in a stirred tank, with introducing a new anchor impeller design by conducting some modifications to the standard anchor impeller shape. Four geometry cases have been presented for achieving the mixing process inside the stirred vessel, CAI; classical anchor impeller, AI1; anchor impeller with added horizontal arm blade, AI2 and AI3 anchor impeller with two and three added arm blades, respectively. The investigation is focused on the effect of inertia and plasticity on the thermo-hydrodynamic behavior (flow pattern, power consumption, and heat transfer) by varying the Reynolds number (Re = 1, 10, 100, 200), Bingham number (Bn = 1, 10, 50), in addition to the effect of geometry design in the overall stirred system parameters. The findings revealed an excellent enhancement of flow pattern and heat transfer in the stirred system relatively to the increase of inertia values. Also, an energy reduction has been remarked and the effect of anchor impeller shape. AI3 geometry design significantly improves the flow pattern and enhances heat transfer by an increased rate of 10.46% over the other cases.

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Section: Resultsmentioning

confidence: 99%

Investigation of mixing viscoplastic fluid with a modified anchor impeller inside a cylindrical stirred vessel using Casson–Papanastasiou model

Benhanifia

Redouane

Rahmani

et al. 2022

Sci Rep

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show abstract

“…In material processing and molding, the mixing, transport, and self-cleaning of solid and liquid materials can be realized through the continuous operation of mixing and kneading machines [9][10][11][12][13]. Panneerselvam et al [14] summarized the structural features and working mechanism of differential mixer and kneader, established a mathematical model of the system and the tooth equation for the end surface of the mixing shaft, and conducted a systematic Fluent analysis on the flow field features of the materials in the mixing cylinder under different stresses, strains, and viscosities.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Fluid Flow Features of Mechanical Mixer with Automatic Variable Frequency Control

Yang¹

2021

IJHT

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For many engineering fields, it is of practical significance to construct and reasonably simplify the solid-liquid two-phase flow model in the cylinder of mechanical mixer. However, the existing studies have not considered how the control technology affects the fluid features in the mixer. From the angle of automatic variable frequency control, this paper carries out a numerical simulation of the fluid flow features in mechanical mixer. Firstly, the authors constructed the system structure for the mixer with automatic variable frequency control, and summarized the basic devices and the number of input/output points of the system. Then, the relationship between the force energy and control frequency of the mixing cylinder was detailed. Afterwards, the Euler-Euler two fluid model was introduced to numerically simulate the solid-liquid two-phase flow in the cylinder of the mixer, which contains both solid particles and liquid, followed by the establishment of control equation, the drag model, and the turbulence model. The proposed model was proved effective through experiments. The research findings provide a reference for the relevant research and the optimal design of the drive module of mixers.

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Numerical investigation of mixed convection in an anchor-stirred tank filled with an Al2O3-water nanofluid

et al. 2021

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Numerical study of hydrodynamic and thermal behaviors of agitated yield-stress fluid

Cited by 5 publications

References 13 publications

Investigation of mixing viscoplastic fluid with a modified anchor impeller inside a cylindrical stirred vessel using Casson–Papanastasiou model

Investigation of mixing viscoplastic fluid with a modified anchor impeller inside a cylindrical stirred vessel using Casson–Papanastasiou model

Numerical Simulation of Fluid Flow Features of Mechanical Mixer with Automatic Variable Frequency Control

Numerical investigation of mixed convection in an anchor-stirred tank filled with an Al2O3-water nanofluid

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