Process viscometry in flows of non-Newtonian fluids using an anchor agitator

Jo, Hae Jin; Jang, Hye Kyeong; Kim, Young Ju; Hwang, Wook Ryol

doi:10.1007/s13367-017-0031-1

Cited by 9 publications

(2 citation statements)

References 10 publications

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“…To overcome these problems, a measurement method that utilises the power input characteristics in the creep region of a known agitator with the Metzner-Otto relation [13] between the effective shear rate and rotation speed for non-Newtonian fluids was suggested by Dostál et al [3]. A similar methodology is often used to measure the viscosity of more complex systems utilising screw agitators [3], helical ribbons [14,15], or anchor agitators [16,17]. The weakness of these methods is hidden in the imprecise nature of the agitator constants, which may vary between agitators of the same type due to imperfections during manufacture, measurement errors, and their intertwined nature.…”

Section: Introductionmentioning

confidence: 99%

CFD Analysis of Ultra-High-Performance Concrete Rheological Tests

Jirout,

Krupica,

Kolomijec

2024

Fluids

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This study connects and compares the results from two different rheological measurement techniques, namely, the slump test and rotational rheometry, on UHPC (Ultra-High-Performance Concrete) through the use of commercially available numerical simulation software ANSYS Fluent 2022 R2. The workability and resulting mechanical properties of the UHPC (a material used in construction) are highly dependent on its rheology and, hence, also on the composition and level of homogeneity of the assessed mixture. It is generally understood that the most suitable rheological model for concrete mixtures is the Hershel–Bulkley model. However, obtaining reliable rheological data is complicated as the wide-gap rotational rheometers developed for concrete show bias in their measurements even on precise laboratory equipment, while common industrial tests, such as the slump test, do not produce the usual shear rate–shear stress relation and, hence, do not allow for more complex analysis. Recently, a new methodology for the rheological measurement of non-Newtonian fluids that utilises a simple power input–rotation speed measurement was published. However, in this study, only model liquids were evaluated, and the method was not validated for more complex fluids such as pastes. Therefore, it was the goal of this study to show this method’s suitability for fine pastes through a comparison with the slump test, using numerical simulation.

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Section: Introductionmentioning

confidence: 99%

CFD Analysis of Ultra-High-Performance Concrete Rheological Tests

Jirout,

Krupica,

Kolomijec

2024

Fluids

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“…Therefore, numerous authors have premeditated the flow of blood in stenotic region by considering blood as a non-Newtonian fluid. For instance, Shukla et al [15] investigated the consequences of stenosis on movement of the blood (non-Newtonian) in an artery, Jung et al [7] studied irregular streams of non-Newtonian fluids in symmetric constricted artery. Also, there are several authors who considered blood as non-Newtonian fluid (Kiran et al [8], Sreenadh et al [16], Kiran et al [10],…”

Section: Introductionmentioning

confidence: 99%

Impact of Multiple Mild Stenoses on the Movement of Casson Fluid in a Non-Uniform Tube

Kiran¹,

Goud²,

Devika

et al. 2022

Comm. Math. Appl.

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The impact of multiple stenoses on the stream of a Casson fluid over a non-uniform pipe has been studied. Under the assumption of mild-stenosis, explicit solutions have been derived to calculate the flow resistance and shear-stress on the wall. The consequences of numerous relevant factors on these flow qualities are deliberated. It is experiential that the flow resistance declines with a change of radius in the plug region, where as the shear stress increases with the same. Further, both the above two flow characteristics upsurge with the elevations of the stenoses. The impacts of boundaries identified with statures of stenoses on shear-stress may support in improved recognition of the fluid mechanical viewpoints in stenotic stream area, which thusly would support in further comprehension of the advancement and improvement of 'Arteriosclerosis' in biological frameworks.

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Comparative numerical and experimental investigation of process viscometry for flows in an agitator with a flat blade turbine impeller

Kim

Hwang

2020

Korea-Aust. Rheol. J.

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Process viscometry in flows of non-Newtonian fluids using an anchor agitator

Cited by 9 publications

References 10 publications

CFD Analysis of Ultra-High-Performance Concrete Rheological Tests

CFD Analysis of Ultra-High-Performance Concrete Rheological Tests

Impact of Multiple Mild Stenoses on the Movement of Casson Fluid in a Non-Uniform Tube

Comparative numerical and experimental investigation of process viscometry for flows in an agitator with a flat blade turbine impeller

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