Wormlike micellar solutions: II. Comparison between experimental data and scission model predictions

Pipe, C. J.; Kim, N. J.; Vasquez, Paula A.; Cook, L. Pamela; McKinley, Gareth H.

doi:10.1122/1.3439729

Cited by 81 publications

(91 citation statements)

References 64 publications

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“…Above this critical shear rate, viscometric flow becomes unstable against the formation of different shear bands [20,22,1,31]. These results are consistent with previous studies that used identical or comparable wormlike micellar solutions [2,49,23,7,36,24].…”

Section: Introductionsupporting

confidence: 82%

“…At small shear rates N 1 displays a quadratic dependence with the applied shear rate, which decreases in the nonlinear regime to an almost linear dependence. This behavior for N 1 is in accordance with previous published results obtained by Pipe et al [36] for the same micellar system, but is not well described by many constitutive models. The range of shear rates experimentally accessible with a rotational rheometer is limited by edge distortions and foaming appearing at moderate shear rates.…”

Section: Introductionsupporting

confidence: 82%

“…This apparent shear thickening in the fluid's viscometric response is now known to be a direct signature of a purely elastic instability in a torsional shear flow. Transient or start-up flows of wormlike micellar solutions have also been widely studied in different flow geometries [3,4,36] and flow visualization has been carried out using different techniques [9,37,16,11].…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal dynamics of multiple shear-banding events for viscoelastic micellar fluids in cone-plate shearing flows

Casanellas¹,

Dimitriou²,

Ober³

et al. 2015

Journal of Non-Newtonian Fluid Mechanics

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We characterize the transient response of semi-dilute wormlike micellar solutions under an imposed steady shear flow in a cone-plate geometry. By combining conventional rheometry with 2-D Particle Image Velocimetry (PIV), we can simultaneously couple the temporal stress response with time-resolved velocimetric measurements. By imposing a well defined shear history protocol, consisting of a stepped shear flow sweep, we explore both the linear and nonlinear responses of two surfactant solutions: cetylpiridinium chloride (CPyCl) and sodium salicylate (NaSal) mixtures at concentrations of [66:40] mM and [100:60] mM, respectively. The transient stress signal of the more dilute solution relaxes to its equilibrium value very fast and the corresponding velocity profiles remain linear, even in the strongly shear-thinning regime. The more concentrated solution also exhibits linear velocity profiles at small shear rates. At large enough shear rates, typically larger than the inverse of the relaxation time of the fluid, the flow field reorganizes giving rise to strongly shear-banded velocity profiles. These are composed of an odd number of shear bands with lowshear-rate bands adjacent to both gap boundaries. In the non-linear regime long transients (much longer than the relaxation time of the fluid) are observed in the transient stress response before the fluid reaches a final, fully-developed state. The temporal evolution in the shear stress can be correlated with the spatiotemporal dynamics of the multiple shear-banded structure measured using RheoPIV. In particular our experiments show the onset of elastic instabilities in the flow which are characterized by the presence of multiple shear bands that evolve and rearrange in time resulting in a slow increase in the average torque acting on the rotating fixture.

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Section: Introductionsupporting

confidence: 82%

Section: Introductionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal dynamics of multiple shear-banding events for viscoelastic micellar fluids in cone-plate shearing flows

Casanellas¹,

Dimitriou²,

Ober³

et al. 2015

Journal of Non-Newtonian Fluid Mechanics

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show abstract

“…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: 92%

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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“…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%

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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Wormlike micellar solutions: II. Comparison between experimental data and scission model predictions

Cited by 81 publications

References 64 publications

Spatiotemporal dynamics of multiple shear-banding events for viscoelastic micellar fluids in cone-plate shearing flows

Spatiotemporal dynamics of multiple shear-banding events for viscoelastic micellar fluids in cone-plate shearing flows

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

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