Entrance effects and high shear rate rheology of shear-banding wormlike micelle fluids in a microcapillary flow

Salipante, Paul; Dharmaraj, Vishnu; Hudson, Steven D.

doi:10.1122/1.5128230

Cited by 11 publications

(7 citation statements)

References 52 publications

(69 reference statements)

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“…Additionally, multiple shorter pipe experiments would be needed to subtract out contributions of the developing region. 53 These are out of scope of the present study. However, looking at the flow of our VES solutions as a transient developing flow of a viscoelastic fluid helps us rationalize the issues with Δ p discussed earlier in Section 4.1.…”

Section: Rheology Of Wormlike Micellar Gelsmentioning

confidence: 87%

“…If the curves were reflective of a steady-state rheology, one can use the stress–curve along with pressure-drop of a fully developed pipe flow to predict the shape of the developed velocity profile in the pipe. This method was exploited for instance in Salipante et al 53 They first fit the flowcurve obtained by rheology to obtain a relationship – = f ( σ ). Using σ = σ w y / R (for radial distance y from the centre of pipe of total width 2 R ), the above relationship is then converted to = f ( σ w , r ).…”

Section: Appendicesmentioning

confidence: 99%

“…Capillary flow has been exploited to calculate rheology of WLM solutions [52][53][54] as well as understand interesting phenomenon like entry effects, 55,56 flow fluctuations 56 and jetting. 57,58 Some attention has been directed towards understanding flow profiles and related banding scenario in these geometries.…”

Section: Introductionmentioning

confidence: 99%

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Shear layers and plugs in the capillary flow of wormlike micellar gels

Gupta,

Daneshi,

Frigaard

et al. 2024

Soft Matter

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Section: Rheology Of Wormlike Micellar Gelsmentioning

confidence: 87%

Section: Appendicesmentioning

confidence: 99%

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Shear layers and plugs in the capillary flow of wormlike micellar gels

Gupta,

Daneshi,

Frigaard

et al. 2024

Soft Matter

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“…x line for the inertial range of Newtonian fluids. Recently, capillary flow rheometry has shown promise in quantifying the relationship between micellar structure and surfactant rheology, such as in the experiments by [99] where they correlate micellar length scales with the shear-thinning behaviour of surfactant solutions at high shear rates. Such an investigation with our VES/EDAB solution could then be useful in conjunction with turbulent flow data at large Reynolds numbers.…”

Section: Streamwise Power Spectral Densitiesmentioning

confidence: 99%

Turbulent drag reduction of viscoelastic wormlike micellar gels

Mitishita¹,

Elfring²,

Frigaard³

2021

Preprint

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Long-chained, viscoelastic surfactant solutions (VES) have been widely employed in the oil and gas industry, particularly in hydraulic fracturing and gravel-packing operations, where turbulence is commonly reached due to high pumping rates. With this motivation, we experimentally investigate the turbulent duct flow of an under-studied class of wormlike micellar solutions that forms a gel at room temperature. The fluid is characterized via rotational rheometry, and the turbulent velocity and Reynolds stress profiles are measured via Laser Doppler Anemometry (LDA). Three surfactant concentrations are investigated at increasing Reynolds numbers. The turbulent flow fields of water, and semi-dilute solutions of partially hydrolyzed polyacrylamide (HPAM) and xanthan gum (XG) are used as comparisons. Our study reveals that the gel-like structure of the wormlike micellar gel is mostly broken down during turbulent flow, especially in the near-wall region where the results indicate the presence of a water layer. Turbulent flow at low concentrations of surfactant show a Newtonian-like flow field throughout most of the duct, where the energy spectra shows a −5/3 power law scale with wavenumber, whereas higher concentrations lead to drag reduction and lower power spectral densities at large wavenumbers. A comparison of the flow of polymeric fluids and the wormlike micellar solutions at maximum drag reduction (MDR) shows comparable drag-reduction effects, with a large decrease in Reynolds shear stresses, and increased turbulence anisotropy in the buffer layer due to the large streamwise fluctuations and near-zero wall-normal fluctuations. At the centreline of the duct, the power spectral densities of polymers and VES are significantly reduced at all wavenumbers probed. Additionally, the MDR regime was bounded by Virk's asymptote for both polymers and the micellar gel, which implies a similar mechanism of drag reduction at MDR.

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“…Therefore, the calibration of the flow meter with the process-oriented liquid is important and the simultaneous determination of the dynamic viscosity under flow conditions is a valuable information for viscosity dependent flow metering methods or other process parameters [1,2]. Pipe viscometers are widely used in industrial and research applications for the measurement of the dynamic viscosity of the liquids [3][4][5][6]. Various instruments are available for the determination of the dynamic viscosity as a Disclaimer/Publisher's Note: The statements, opinions, and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s).…”

Section: Introductionmentioning

confidence: 99%

Traceability of the Micro Scale Pipe Viscometer for Traceable Calibration of Dynamic Viscosity

Neuhaus¹,

Bissig²,

Bircher³

et al. 2023

Preprint

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Calibration of flow devices is important in several areas of pharmaceutical, flow chemistry and microfluidic applications where dosage of process liquids or accurate measurement of the flow rate is important. The process-oriented liquid itself might influence the performance of the flow device and the simultaneous determination of the dynamic viscosity under flow conditions might be a valuable information for the process parameters. To offer the simultaneous calibration of the dynamic viscosity of the process-oriented liquid at the corresponding flowrate, METAS has built a pipe viscometer for the traceable in-line measurement of the dynamic viscosity in the current flow facilities for low flow rates from 1 L/min to 150 mL/min and pressure drops up to 10 bar. The traceability of all the measuring quantities as well as the geometrical dimensions of the micro tube guarantee the traceability of the pipe viscometer to SI units. The most challenging part is the traceable determination of the inner diameter of the micro tube. This can be achieved by measuring the pressure drop as a function of flow rate with the pipe viscometer and applying the law of Hagen-Poiseuille with a traceable dynamic viscosity of a reference liquid (water) or perform the measurements with the micro-CT at METAS, which determines the inner diameter by x-ray diffraction. The validation of the stated measurement uncertainty of the pipe viscometer has been performed by means of calibration of the dynamic viscosity of several reference liquids with traceable density and kinematic viscosity. The setup of the facility, the traceability as well as the uncertainty calculation of the pipe viscometer for the in-line measurement of the dynamic viscosity are discussed in this paper.

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Entrance effects and high shear rate rheology of shear-banding wormlike micelle fluids in a microcapillary flow

Cited by 11 publications

References 52 publications

Shear layers and plugs in the capillary flow of wormlike micellar gels

Shear layers and plugs in the capillary flow of wormlike micellar gels

Turbulent drag reduction of viscoelastic wormlike micellar gels

Traceability of the Micro Scale Pipe Viscometer for Traceable Calibration of Dynamic Viscosity

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