Rheological Parameters of Shear-Thickening Fluids Using an Experimental Design

Bosco, Alfredo Jackson Telles; Calado, Verônica; Maia, João M.

doi:10.1590/1980-5373-mr-2018-0631

Cited by 10 publications

(4 citation statements)

References 19 publications

(22 reference statements)

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“…In a study by Bosco et al [29] a mix of mainly polyethyleneglycol (PEG) and fumed silica particles were tested at atmospheric pressure and increasing shear rate, which showcased similar results as in this work. At low shear rates, a decrease is first seen, then an increase happens until a critical point.…”

Section: Regression Analysissupporting

confidence: 81%

Characteristics of Viscosity of a Scale Inhibitor: An Experimental Study

et al. 2023

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The use of chemical scale inhibitors in the oil and gas industry for subsea installations has been presented for a long time, but the ever-increasing exploration of HPHT (high pressure high temperature) wells put demands on knowledge of how the rheological properties such as viscosity of scale inhibitors behave under large pressures. This work reports new experimental data of high-pressure viscosity using a rotational rheometer, measured across a pressure range of 0.1 MPa to 15 MPa, at temperatures from 273 K to 298 K, and a broad range of shear rates, 100 $$s^{-1}$$ s - 1 to 1000 $$s^{-1}$$ s - 1 for a scale inhibitor. The experimental data are used to construct a power-law regression model with fitting parameters. Results indicate that the inhibitor shows a near Newtonian behavior.

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Section: Regression Analysissupporting

confidence: 81%

Characteristics of Viscosity of a Scale Inhibitor: An Experimental Study

et al. 2023

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“…For k, there were significant differences ( p < 0.05) among the BG samples. The k parameter is related to the apparent viscosity and the higher the k value, the higher the viscosity is [ 42 , 43 ]; this confirms the apparent viscosity results, which suggest that from BG40:60 (25.44 ± 6.20) to BG20:80 (27.86 ± 2.90), the BG samples were more structured and firmer in comparison to the other BG samples and did not present statistical differences ( p > 0.05). As for n, all the BG samples presented n < 1, which corresponds to a pseudoplastic behavior [ 44 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Potato Starch Hydrogel:Glycerol Monostearate Oleogel Ratio on the Physico-Rheological Properties of Bigels

Barroso¹,

Karatay²,

Hubinger³

2022

Gels

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Bigel (BG) has been shown to be promising for the food industry due to the possibility to manipulate the properties of the system by adjusting the ratio of each individual phase, namely the hydrogel (H) and oleogel (O) phases. This work aimed to evaluate the influence of the O:H ratio on the physical-rheological properties of BG produced with potato starch (PS) and glycerol monostearate (GM). The hydrogel hardness (i.e., 1423.47 g) directly influenced the viscosity of the BG samples, as BG with a higher H-phase presented the highest viscosity and firmness. All BG samples presented shear-thinning behavior and structural breakdown at ~50 °C. BG with a higher O-phase had superior results for thermal stability, softer texture, and yield stress values, representative of good plasticity and spreadability, as compared to BG with less O-phase. The BG with 80% H-phase was less stable during the 21 days of storage in relation to the other BG samples. This study showed the role that the O:H ratio plays in the development of PS-GM-based BGs with tailor-made physical-rheological properties. In addition, the BG is an easily reproduced system with great potential to be used as a trans and saturated fat substitute in food applications.

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“…At first, various rheological measurements show that some STFs first shear-thin before shear-thicken. 3,4,56 The present version of the model is unable of reproducing this behavior. This may be amended by considering coupling terms between the structural variables, which we have currently omitted for mere simplicity.…”

Section: Discussionmentioning

confidence: 76%

On the consistent modeling of shear-thickening polymer solutions

Stephanou

2021

Physics of Fluids

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During the past few decades, the interest in understanding the peculiar rheological behavior of shear-thickening fluids has increased due to their potential use in various commercial applications. In such an endeavor, the optimal design of these fluids is essential, which necessitates our in-depth understanding of their properties from a modeling perspective. We herein introduce a continuum model to predict the rheological behavior of shear-thickening polymer solutions using non-equilibrium thermodynamics that guarantees, by construction, consistency with the laws of thermodynamics as extended to handle non-equilibrium systems. This is made possible by using a scalar structural variable that characterizes the formation of the shear-induced structure at sufficiently high shear rates, and a conformation tensor that characterizes the deformation of the polymer segments. The model predicts the exhibition of a shear-thickening behavior for all steady shear flow material functions (shear viscosity and normal stress coefficients), which is then followed by a shear-thinning behavior if finite extensibility or anisotropic effects are considered. We further document that these model predictions are in line with available shear viscosity rheological data for shear-thickening polymer solutions.

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Rheological Parameters of Shear-Thickening Fluids Using an Experimental Design

Cited by 10 publications

References 19 publications

Characteristics of Viscosity of a Scale Inhibitor: An Experimental Study

Characteristics of Viscosity of a Scale Inhibitor: An Experimental Study

Effect of Potato Starch Hydrogel:Glycerol Monostearate Oleogel Ratio on the Physico-Rheological Properties of Bigels

On the consistent modeling of shear-thickening polymer solutions

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