Complex Fluids and Hydraulic Fracturing by Desroches, Jean, Robisson, Agathe, McKinley, Gareth H., Barbati, Alexander C

“…An extremely wide range of complex fluids are used: naturally occurring polysaccharide and synthetic polymer solutions, aqueous physical and chemical gels, organic gels, micellar surfactant solutions, emulsions, and foams. …”
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Optical tweezer measurements of asymptotic nonlinearities in complex fluids by Gupta, Satish Kumar, Lennon, Kyle R., Joens, Mary A., Bandi, Hari, Van Galen, Martijn, Han, YuLong, Tang, Wenhui, Li, Yiwei, Wasserman, Steven Charles, Swan, James W., Guo, Ming

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A canonical framework for modeling elasto-viscoplasticity in complex fluids by Dimitriou, Christopher J, McKinley, Gareth H

“…A comprehensive framework for modeling elasto-viscoplasticity in complex fluids is discussed. It is based on the plasticity mechanism of kinematic hardening, which is widely accepted in solid mechanics and accounts for transient yielding processes. …”
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Spatially resolved quantitative rheo-optics of complex fluids in a microfluidic device by Ober, Thomas Joseph, Soulages, Johannes, McKinley, Gareth H.

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Incorporating Rheological Nonlinearity into Fractional Calculus Descriptions of Fractal Matter and Multi-Scale Complex Fluids by Rathinaraj, Joshua David John, McKinley, Gareth H., Keshavarz, Bavand

“…The linear viscoelastic properties of many multi-scale complex fluids exhibit a power-law behavior that spans over many orders of magnitude in time or frequency, and we can accurately describe this linear viscoelastic rheology using fractional constitutive models. …”
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A fractional K-BKZ constitutive formulation for describing the nonlinear rheology of multiscale complex fluids by Jaishankar, Aditya, McKinley, Gareth H.

“…Empirical rules such as the Cox–Merz rule and Gleissle mirror relations are frequently used to estimate the nonlinear response of complex fluids from linear rheological data. We use the fractional model framework to assess the performance of such heuristic rules and quantify the systematic offsets, or shift factors, that can be observed between experimental data and the predicted nonlinear response. …”
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A review of nonlinear oscillatory shear tests: Analysis and application of large amplitude oscillatory shear (LAOS) by Hyun, Kyu, Wilhelm, Manfred, Klein, Christopher O., Cho, Kwang Soo, Nam, Jung Gun, Ahn, Kyung Hyun, Lee, Seung Jong, Ewoldt, Randy H., McKinley, Gareth H.

“…Dynamic oscillatory shear tests are common in rheology and have been used to investigate a wide range of soft matter and complex fluids including polymer melts and solutions, block copolymers, biological macromolecules, polyelectrolytes, surfactants, suspensions, emulsions and beyond. …”
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Why the Cox–Merz rule and Gleissle mirror relation work: A quantitative analysis using the Wagner integral framework with a fractional Maxwell kernel by Rathinaraj, Joshua David John, Keshavarz, Bavand, McKinley, Gareth H

“…To incorporate the nonlinearities that always become important in real complex fluids at large strain amplitudes, we consider both an exponential damping function as well as a more general damping function. …”
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Theoretical and numerical analysis of unsteady fractional viscoelastic flows in simple geometries by Ferrás, LL, Ford, Neville J, Morgado, Maria Luísa, Rebelo, Magda, McKinley, Gareth H, Nóbrega, João M

“…We prove solvability, study numerical convergence of the method, and also discuss the applicability of this method for simulating the rheological response of complex fluids in a real concentric cylinder rheometer. …”
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Microfluidic extensional rheometry using a hyperbolic contraction geometry by Ober, Thomas Joseph, Haward, Simon J., Pipe, Christopher J., Soulages, Johannes, McKinley, Gareth H.

“…Microfluidic devices are ideally suited for the study of complex fluids undergoing large deformation rates in the absence of inertial complications. …”
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Rod-climbing rheometry revisited by More, Rishabh V, Patterson, Reid, Pashkovski, Eugene, McKinley, Gareth H

“…<jats:p>The rod-climbing or “Weissenberg” effect, in which the free surface of a complex fluid climbs a thin rotating rod is a popular and convincing experiment to not only demonstrate the existence of elasticity but also to quantify it in complex fluids.…”
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Mapping thixo-elasto-visco-plastic behavior by Ewoldt, Randy H., McKinley, Gareth H

“…However, in many complex fluids and soft solids, the manifestation of a yield stress is also accompanied by other complex rheological phenomena such as thixotropy and viscoelastic transient responses, both above and below the critical stress. …”
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Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials by Ewoldt, Randy H., Winter, Peter, Maxey, Jason, McKinley, Gareth H.

“…Experimental results are presented for two complex fluids, a pseudoplastic shear-thinning xanthan gum solution and an elastoviscoplastic invert-emulsion drilling fluid. …”
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Probing shear-banding transitions of the VCM model for entangled wormlike micellar solutions using large amplitude oscillatory shear (LAOS) deformations by Zhou, Lin, Cook, L. Pamela, McKinley, Gareth H.

“…The state of stress in these complex fluids is described by a class of viscoelastic constitutive models which capture the key linear and nonlinear rheological features of wormlike micellar solutions, including the breakage and reforming of an entangled network. …”
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Ligament Mediated Fragmentation of Viscoelastic Liquids by Houze, Eric C., Moore, John R., Koerner, Michael R., Keshavarz, Bavand, McKinley, Gareth H

“…The breakup and atomization of complex fluids can be markedly different than the analogous processes in a simple Newtonian fluid. …”
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Stagnation point flow of wormlike micellar solutions in a microfluidic cross-slot device: Effects of surfactant concentration and ionic environment by Haward, Simon J., McKinley, Gareth H

“…By combining the measurements of critical conditions for the flow transitions with the viscometric material properties and the degree of shear-thinning characterizing each test fluid, it is possible to construct a stability diagram for viscoelastic flow of complex fluids in the cross-slot geometry.…”
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Finite volume simulations of particle-laden viscoelastic fluid flows: application to hydraulic fracture processes by Fernandes, C., Faroughi, S. A., Ribeiro, R., Isabel, A., McKinley, G. H.

“…Abstract Accurately resolving the coupled momentum transfer between the liquid and solid phases of complex fluids is a fundamental problem in multiphase transport processes, such as hydraulic fracture operations. …”
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Reinforcement learning for bluff body active flow control in experiments and simulations by Fan, Dixia, Yang, Liu, Wang, Zhicheng, Triantafyllou, Michael S, Karniadakis, George Em

“…While RL has been used effectively previously in idealized computer flow simulation studies, this study demonstrates its effectiveness in experimental fluid mechanics and verifies it by simulations, potentially paving the way for efficient exploration of additional active flow control strategies in other complex fluid mechanics applications.…”
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Study of fluid resonance between two side-by-side floating barges by Li, Xin, Yang, Jian-min, Xu, Liangyu

“…To overcome this limitation and investigate the complex fluid flow around multiple bodies in detail, this study examines the fluid resonance between two identical floating barges using a viscous flow analysis program FLOW-3D. …”
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Power-law rheology in the bulk and at the interface: quasi-properties and fractional constitutive equations by Jaishankar, Aditya, McKinley, Gareth H.

“…Finally, we demonstrate the predictive ability of the FMM to quantitatively capture the behaviour of complex viscoelastic interfaces by combining the measured quasi-properties with the equation of motion for a complex fluid interface to describe the damped inertio-elastic oscillations that are observed experimentally.…”
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