Transient Shear Banding in a Simple Yield Stress Fluid

Abstract

We report a large set of experimental data which demonstrates that a simple yield stress fluid, i.e. which does not present aging or thixotropy, exhibits transient shear banding before reaching a steady state characterized by a homogeneous, linear velocity profile. The duration of the transient regime decreases as a power law with the applied shear rate $\dot{\gamma }$. This power law behavior, observed here in carbopol dispersions, does not depend on the gap width and on the boundary conditions for a given sample preparation. For $\dot{\gamma }\lesssim 0.1$ s${}^{-1}$, heterogeneous flows could be observed for as long as 10${}^5$ s. These local dynamics account for the ultraslow stress relaxation observed at low shear rates.

4 pages, 4 figures

References in corpus (6)

• Phenomenology and physical origin of shear-localization and shear-banding in complex fluids
• Yielding and flow in adhesive and non-adhesive concentrated emulsions
• Shear banding, aging and noise dynamics in soft glassy materials
• Wide-gap Couette flows of dense emulsions: Local concentration measurements, and comparison between macroscopic and local constitutive law measurements through magnetic resonance imaging
• Transition from a simple yield stress fluid to a thixotropic material
• Influence of boundary conditions on yielding in a soft glassy material

Cited by in corpus (63)

• Yield Stress Materials in Soft Condensed Matter
• The Physics of the Colloidal Glass Transition
• Shear Banding of Complex Fluids
• Shear banding and flow-concentration coupling in colloidal glasses
• Slip at Fluid-Solid Interface
• On the existence of a simple yield stress fluid behavior
• Rheological hysteresis in soft glassy materials
• From transient fluidization processes to Herschel-Bulkley behavior in simple yield stress fluids
• Stress overshoot in a simple yield stress fluid: an extensive study combining rheology and velocimetry
• Stress localization, stiffening and yielding in a model colloidal gel
• Timescales in creep and yielding of attractive gels
• Criteria for shear banding in time-dependent flows of complex fluids
• Shear banding in soft glassy materials
• Age-dependent transient shear banding in soft glasses
• Transient shear banding in entangled polymers: a study using the Rolie-Poly model
• Formation and growth of shear bands in glasses: existence of an underlying directed percolation transition
• Yielding dynamics of a Herschel-Bulkley fluid: a critical-like fluidization behaviour
• Power-law creep and residual stresses in a carbopol microgel
• Ductile and brittle yielding in thermal and athermal amorphous materials
• Inhomogeneous shear flows in soft jammed materials with tunable attractive forces
• Shear banding in time-dependent flows of polymers and wormlike micelles
• Time dependence in large amplitude oscillatory shear: a rheo-ultrasonic study of fatigue dynamics in a colloidal gel
• Fractures in complex fluids: the case of transient networks
• Understanding rheological hysteresis in soft glassy materials
• Triggers and signatures of shear banding in steady and time-dependent flows
• Improved Rheometry of Yield Stress Fluids Using Bespoke Fractal 3D Printed Vanes
• Investigation of shear banding in three-dimensional foams
• Onset of flow in a confined colloidal glass under an imposed shear stress
• Computing the linear viscoelastic properties of soft gels using an Optimally Windowed Chirp protocol
• Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions
• Signatures of Physical Aging and Thixotropy in Aqueous Dispersion of Carbopol
• Shear Banding of Soft Glassy Materials in Large Amplitude Oscillatory Shear
• Stress Overshoots in Simple Yield Stress Fluids
• New insights on carbon black suspension rheology -- anisotropic thixotropy and anti-thixotropy
• Unified theoretical and experimental view on transient shear banding
• Heterogeneous dynamics during yielding of glasses: effect of aging
• Deformation and flow of amorphous solids: An updated review of mesoscale elastoplastic models
• Shear banding in large amplitude oscillatory shear (LAOStrain and LAOStress) of soft glassy materials
• Simultaneous measurement of the microscopic dynamics and the mesoscopic displacement field in soft systems by speckle imaging
• Yielding, shear banding and brittle failure of amorphous materials
• Emergence and persistence of flow inhomogeneities in the yielding and fluidization of dense soft solids
• Yielding and plasticity in amorphous solids
• Linear Stability Analysis for Plane-Poiseuille Flow of an Elastoviscoplastic fluid with internal microstructure
• A computational study of transient shear banding in soft jammed solids
• Deformation profiles and microscopic dynamics of complex fluids during oscillatory shear experiments
• Shear banding in large amplitude oscillatory shear (LAOStrain and LAOStress) of polymers and wormlike micelles
• Athermal rheology of weakly attractive soft particles
• Metastability at the Yield-Stress Transition in Soft Glasses
• Transient Shear Banding in Time-dependent Fluids
• Continuum modelling of shear start-up in soft glassy materials
• Elastoviscoplastic rheology and ageing in a simplified soft glassy constitutive model
• Slippery flows of a Carbopol gel in a micro-channel
• A Small-gap Effective-Temperature Model of Transient Shear Band Formation During Flow
• Shear-banding and superdiffusivity in entangled polymer solutions
• Flow heterogeneities in supercooled liquids and glasses under shear
• Finite-size spherical particles in a square duct flow of an elastoviscoplastic fluid: an experimental study
• Brittle yielding in supercooled liquids below the critical temperature of mode coupling theory
• Start-up inertia as an origin for heterogeneous flow
• Wall slip and bulk yielding in soft particle suspensions
• A mesoscale study of creep in a microgel using the acoustic radiation force
• Continuum modeling of Soft Glassy Materials under shear
• Interplay between wall slip and shear banding in a thixotropic yield stress fluid
• Transient start-up dynamics and shear banding in aging soft glassy materials: Rate-controlled flow field