Velocity profiles in shear-banding wormlike micelles
arXiv:cond-mat/0211475 · doi:10.1103/PhysRevLett.90.228303
Abstract
Using Dynamic Light Scattering in heterodyne mode, we measure velocity profiles in a much studied system of wormlike micelles (CPCl/NaSal) known to exhibit both shear-banding and stress plateau behavior. Our data provide evidence for the simplest shear-banding scenario, according to which the effective viscosity drop in the system is due to the nucleation and growth of a highly sheared band in the gap, whose thickness linearly increases with the imposed shear rate. We discuss various details of the velocity profiles in all the regions of the flow curve and emphasize on the complex, non-Newtonian nature of the flow in the highly sheared band.
4 pages, 5 figures, submitted to Phys. Rev. Lett
References in corpus (1)
Cited by in corpus (38)
- Shear Banding of Complex Fluids
- Recent experimental probes of shear banding
- Slow flows of yield stress fluids: complex spatio-temporal behaviour within a simple elasto-plastic model
- Rheology of Wormlike Micelles : Equilibrium Properties and Shear Banding Transition
- High-frequency ultrasonic speckle velocimetry in sheared complex fluids
- Spatio-temporal dynamics of wormlike micelles under shear
- Shear banding in soft glassy materials
- Shear-induced transitions and instabilities in surfactant wormlike micelles
- Shear viscosity and shear thinning in two-dimensional Yukawa liquids
- Shear-banding in a lyotropic lamellar phase, Part 1: Time-averaged velocity profiles
- Mesoscopic lattice Boltzmann modeling of soft-glassy systems: theory and simulations
- Interface instability in shear banding flow
- Ultrafast ultrasonic imaging coupled to rheometry: principle and illustration
- Velocity Profiles in Slowly Sheared Bubble Rafts
- Elastic turbulence in shear banding wormlike micelles
- Impact of boundaries on velocity profiles in bubble rafts
- Shear banding in time-dependent flows of polymers and wormlike micelles
- Taylor-like vortices in the shear-banding flow of giant micelles
- The interplay between boundary conditions and flow geometries in shear banding: hysteresis, band configurations, and surface transitions
- Wall slip, shear banding, and instability in the flow of a triblock copolymer micellar solution
- Symmetric shear banding and swarming vortices in bacterial "superfluids"
- Morphologies and flow patterns in quenching of lamellar systems with shear
- Shear-banding in a lyotropic lamellar phase, Part 2: Temporal fluctuations
- Dynamics and rheology under continuous shear flow studied by X-ray photon correlation spectroscopy
- Flow transitions in two-dimensional foams
- Superposition rheology of shear-banding wormlike micelles
- Velocity Profiles in Repulsive Athermal Systems under Shear
- A mesoscopic model for the rheology of soft amorphous solids, with application to mi- crochannel flows
- Dynamic Response of Block Copolymer Wormlike Micelles to Shear Flow
- Surfactant micelles: model systems for flow instabilities of complex fluids
- Medium Amplitude Parallel Superposition (MAPS) Rheology, Part 2: Experimental Protocols and Data Analysis
- Loss of solutions in shear banding fluids in shear banding fluids driven by second normal stress differences
- Soft Dynamics simulation: 2. Elastic spheres undergoing a T1 process in a viscous fluid
- Molecular rotors to probe the local viscosity of a polymer glass
- Multispeckle diffusing wave spectroscopy as a tool to study heterogeneous mechanical behavior in soft solids
- Medium Amplitude Parallel Superposition (MAPS) Rheology of a Wormlike Micellar Solution
- Describing the Flow Curve of Shear-Banding Fluids Through a Structural Minimal Model
- Instability and stress fluctuations of a probe driven through a worm-like micellar fluid