Nghe, P., Fielding, S. M., Tabeling, P., Ajdari, A.
Using a micro particle imaging velocity technique, we resolve for the first time the three dimensionnal structure of wormlike shear banding flows in straight microchannels. The study revealed two...
Shear banding, aging and noise dynamics in soft glassy materials (2008)
Fielding, S M, Cates, M E, Sollich, P
The `soft glassy rheology' (SGR) model gives an appealing account of the flow of nonergodic soft materials in terms of the local yield dynamics of mesoscopic elements. Newtonian, power-law, and...
Shearing active gels close to the isotropic-nematic transition (2008)
Cates, M. E., Fielding, S. M., Marenduzzo, D., Orlandini, E., Yeomans, J. M.
We study numerically the rheological properties of a slab of active gel close o the isotropic-nematic transition. The flow behavior shows strong dependence on sample size, boundary conditions, and on...
Adams, J.M., Fielding, S.M., Olmsted, P.D.
We study shear banding flows in models of wormlike micelles or polymer solutions, and explore the effects of different boundary conditions for the viscoelastic stress. These are needed because the...
Adams, J. M., Fielding, S. M., Olmsted, P. D.
We study shear banding flows in models of wormlike micelles or polymer solutions, and explore the effects of different boundary conditions for the viscoelastic stress. These are needed because the...
Vorticity structuring and velocity rolls triggered by gradient shear bands (2007)
We suggest a mechanism by which vorticity structuring and velocity rolls can form in complex fluids, triggered by the linear instability of one-dimensional gradient shear banded flow. We support this...
Complex dynamics of shear banded flows (2007)
Many complex fluids undergo a flow induced transition to a state of coexisting bands of differing viscosities and internal structuring. This effect, which is called shear banding, is widely observed...
Rheology of giant micelles (2006)
Giant micelles are elongated, polymer-like objects created by the self-assembly of amphiphilic molecules (such as detergents) in solution. Giant micelles are typically flexible, and can become highly...
Nonlinear dynamics of an interface between shear bands (2006)
We study numerically the nonlinear dynamics of a shear banding interface in two-dimensional planar shear flow, within the nonlocal Johnson-Segalman model. Consistent with a recent linear stability...
We consider the linear stability of shear banded planar Couette flow of the Johnson–Segalman fluid, with and without the addition of stress diffusion to regularise the equations. In particular, we...
Wilson, H. J., Fielding, S. M.
We consider the linear stability of shear banded planar Couette flow of the Johnson-Segalman fluid, with and without the addition of stress diffusion to regularise the equations. In particular, we...
Linear instability of planar shear banded flow (2005)
We study the linear stability of planar shear banded flow with respect to perturbations with wave vector in the plane of the banding interface, within the nonlocal Johnson-Segalman model. We find...
Spatio-temporal oscillations and rheochaos in a simple model of shear banding (2004)
We study a simple model of shear banding in which the flow-induced phase is destabilized by coupling between flow and microstructure (wormlike micellar length). By varying the strength of instability...
We present a unified model of shear-induced demixing and "mechanical" shear banding instabilities in polymeric and surfactant solutions, by combining a simple flow instability with a two-fluid...
Kinetics of the shear banding instability in startup flows (2003)
Motivated by recent light scattering experiments on semidilute wormlike micelles, we study the early stages of the shear banding instability using the nonlocal Johnson-Segalman model with a...
Flow phase diagrams for concentration-coupled shear banding (2003)
After surveying the experimental evidence for concentration coupling in the shear banding of wormlike micellar surfactant systems, we present flow phase diagrams spanned by shear stress $\Sigma$ (or...
Equivalence of driven and aging fluctuation-dissipation relations in the trap model (2003)
We study the nonequilibrium version of the fluctuation-dissipation (FD) relation in the glass phase of a trap model that is driven into a nonequilibrium steady state by external "shear." This extends...
Observation dependence of fluctuation-dissipation relations and effective temperatures (2002)
Fielding, S.M., Sollich, Peter
We study the nonequilibrium fluctuation-dissipation theorem (FDT) in the glass phase of Bouchaud’s trap model. We incorporate an arbitrary observable m and obtain its correlation and response...
Interrupted coarsening in a driven kinetically constrained ising chain (2002)
We introduce a driven version of the one-dimensional kinetically constrained spin chain [J. Jackle and S. Eisinger, Zeitschr. Phys. B 84, 115 (1991)]. In its original undriven version, this model...
Fluctuation-dissipation relations and effective temperatures in simple non-mean field systems (2002)
Sollich, P., Fielding, S.M., Mayer, P.
We give a brief review of violations of the fluctuation-dissipation theorem (FDT) in out-of-equilibrium systems; in mean field scenarios the corresponding fluctuation-dissipation (FD) plots can, in...
Observable dependence of fluctuation-dissipation relations and effective temperatures (2002)
Fielding, S.M., Sollich, Peter
We study the nonequilibrium fluctuation-dissipation theorem (FDT) in the glass phase of Bouchaud’s trap model. We incorporate an arbitrary observable m and obtain its correlation and response...
Ageing and rheology in soft materials (2000)
We study theoretically the role of aging in the rheology of soft materials. We define several generalized rheological response functions suited to aging samples (in which time translation invariance...
Ageing and Rheology in Soft Materials (1999)
Fielding, S. M., Sollich, P., Cates, M. E.
We study theoretically the role of ageing in the rheology of soft materials. We define several generalized rheological response functions suited to ageing samples (in which time translation...
Ageing and Rheology in Soft Materials (1999)
S.M. Fielding, P. Sollich, M.E. Cates
We study theoretically the role of ageing in the rheology of soft materials.