Nonlinear shear and extensional flow dynamics of wormlike surfactant solutions

Yeşilata, Bülent; Clasen, Christian; McKinley, Gareth H.

doi:10.1016/j.jnnfm.2005.10.009

Cited by 139 publications

(94 citation statements)

References 99 publications

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“…By observing the evolution of these structures during start-up of steady shear at these higher shear rates, it is apparent that the regions of varying contrast begin to form near the rim of the sample, grow in time and propagate radially towards the center. Corresponding measurements of the total torque exerted on the fixture show the growth of temporal fluctuations (Yesilata et al, 2006;Pipe et al, 2010). This suggests that a three-dimensional unsteady secondary flow first develops near the outer edge where the sample meniscus is located, and propagates towards the center.…”

Section: Onset Of Secondary Flowmentioning

confidence: 90%

Rheo-PIV of a shear-banding wormlike micellar solution under large amplitude oscillatory shear

et al. 2012

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We explore the behavior of a wormlike micellar solution under both steady and large amplitude oscillatory shear (LAOS) in a cone-plate geometry through simultaneous bulk rheometry and localized velocimetric measurements. First, particle image velocimetry is used to show that the shear banded profiles observed in steady shear are in qualitative agreement with previous results for flow in the cone-plate geometry. Then under LAOS, we observe the onset of shear-banded flow in the fluid as it is progressively deformed into the non-linear regime -this onset closely coincides with the appearance of higher harmonics in the periodic stress signal measured by the rheometer. These harmonics are quantified using the higher order elastic and viscous Chebyshev coefficients e n and v n , which are shown to grow as the banding behavior becomes more pronounced. The high resolution of the velocimetric imaging system enables spatiotemporal variations in the structure of the banded flow to be observed in great detail. Specifically, we observe that at large strain amplitudes (γ 0 ≥ 1) the fluid exhibits a 3-banded velocity profile with a high shear rate band located in-between two lower shear rate bands adjacent to each wall. This band persists over the full cycle of the oscillation, resulting in no phase lag being observed between the appearance of the band and the driving strain amplitude. In addition to the kinematic measurements of shear banding, the methods used to prevent wall slip and edge irregularities are discussed in detail, and these methods are shown to have a measurable effect on the stability boundaries of the shear banded flow.

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Section: Onset Of Secondary Flowmentioning

confidence: 90%

Rheo-PIV of a shear-banding wormlike micellar solution under large amplitude oscillatory shear

et al. 2012

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“…According to , shear banding and shear-thinning behavior are the result of the existence of wormlike micelles due to the dynamics of relaxation, breakage and recombination of the micellar structure as well as the alignment of the chains and disentanglement with respect to the flow gradient (Hu and Lips 2005;. These listed references provide more information about the relation between shear banding and wormlike micelle structures Calabrese et al 2015;Cappelaere and Cressely 1997;Delgado et al 2009;Dhont and Briels 2008;Fardin et al 2015;Helgeson et al 2009;Hu and Lips 2005;Hu et al 2008;Liberatore et al 2009;Manneville 2008;Miller and Rothstein 2007;Pipe et al 2010;Thareja et al 2011;Yesilata et al 2006).…”

Section: Effect Of Shear Ratementioning

confidence: 99%

“…4 that solutions at 1 wt% and 2 wt% DTTM and salinities at 20 wt% and 25 wt% NaCl display a stress plateau, perhaps signifying the presence of wormlike micelles. In this regime, the flow becomes strongly time dependent as stress fluctuates between a maximum and minimum value at a given shear rate (Yesilata et al 2006). The time for stress to equilibrate in the plateau region can be two or more orders of magnitudes higher than the viscoelastic relaxation time of the fluid, causing uncertainty of the plateau's slope, curvature and reproducibility of the data (Yesilata et al 2006).…”

Section: Effect Of Shear Ratementioning

confidence: 99%

“…In this regime, the flow becomes strongly time dependent as stress fluctuates between a maximum and minimum value at a given shear rate (Yesilata et al 2006). The time for stress to equilibrate in the plateau region can be two or more orders of magnitudes higher than the viscoelastic relaxation time of the fluid, causing uncertainty of the plateau's slope, curvature and reproducibility of the data (Yesilata et al 2006). Moreover, no apparent stress plateau is detected at lower salt and surfactant concentrations, as stress remains linear.…”

Section: Effect Of Shear Ratementioning

confidence: 99%

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A systematic rheological study of alkyl amine surfactants for fluid mobility control in hydrocarbon reservoirs

2018

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The basis of this study is to identify the versatility of N,N,N 0 -trimethyl-N 0 -tallow-1,3-diaminopropane (DTTM) surfactant in high saline environments. The surfactant was examined with sodium chloride, NaCl, to understand how triggers such as salt, pH, temperature, and surfactant concentration influences the viscoelastic response of the surfactant solution. The DTTM surfactant and salt (NaCl) concentrations used in steady-state shear viscosity analysis range from 0.2 wt% to 2 wt% and 5 wt% to 25 wt%, respectively. Along with DTTM results, three similar chemical structures are investigated to understand how viscosity changes with alterations in tail and head group composition. It was found that DTTM surfactant has the capability of transitioning from a foam-bearing to viscoelastic state at low surfactant concentrations under moderate to high saline conditions. A longer tail length promotes viscoelasticity and shear-thinning behavior. Terminals consisting of hydroxides or ethoxylates have a lower viscosity than that of methyl terminals. A head group consisting of two nitrogen atoms has a higher viscosity than those containing one nitrogen atom. The rheological characterization of DTTM presented in this paper is part of a larger study in determining the capability of this surfactant to foam CO 2 for improving mobility control in CO 2 enhanced oil recovery in high saline oil formations.

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“…In numerical studies of flows of micellar solution, microscopic simulations such as molecular dynamics [9][10][11] [13][14][15][16][17] , the Johnson-Segalman model with an added Newtonian viscosity 18) , and the Bautista-Manero (BM) model. [19][20][21] Employing these constitutive equations, we can numerically predict the flow behavior of a fluid that has a non-monotonic flow curve, which is a typical property of wormlike micellar solutions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Startup Flows of Wormlike Micellar Solutions in an Axisymmetric Capillary Channel using a Modified Bautista-Manero Model

Yamashita

Yamamoto

Hashimoto

2009

J. Soc. Rheol., Jpn

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Startup flows of wormlike micellar solutions in an axisymmetric capillary channel were numerically studied using a modified Bautista-Manero (MBM) model as a constitutive equation. The values of model parameter of the MBM model decided for a CTAB/NaSal solution were employed. The velocity profile at steady state predicted by the numerical simulation agreed with corresponding experimental data. The present study treated startup flows at a constant pressure gradient, which corresponds to a stress-controlled-type flow. The flow rate increased with time until the flow reached a steady state. The velocity profile had an inflection point around which the velocity gradient rapidly changed. The position of inflection point slightly changed with time. Temporal changes in both fluidity and the micellar contribution to shear stress occurred within a wall side region of the inflection point, where a white turbidity phenomenon was observed in our previous experiments. These temporal responses are characteristic of the startup flow at constant pressure gradients.

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Nonlinear shear and extensional flow dynamics of wormlike surfactant solutions

Abstract: Abstract…………………………………………………………………………………………………….

Cited by 139 publications

References 99 publications

Rheo-PIV of a shear-banding wormlike micellar solution under large amplitude oscillatory shear

Rheo-PIV of a shear-banding wormlike micellar solution under large amplitude oscillatory shear

A systematic rheological study of alkyl amine surfactants for fluid mobility control in hydrocarbon reservoirs

Numerical Simulation of Startup Flows of Wormlike Micellar Solutions in an Axisymmetric Capillary Channel using a Modified Bautista-Manero Model

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