All Outputs (7)

Interplay of edge fracture and shear banding in complex fluids (2020)
Journal Article
Hemingway, E. J., & Fielding, S. M. (2020). Interplay of edge fracture and shear banding in complex fluids. Journal of Rheology, 64(5), Article 1147. https://doi.org/10.1122/8.0000086

We explore theoretically the interplay between shear banding and edge fracture in complex fluids by performing a detailed simulation study within two constitutive models: the Johnson–Segalman model and the Giesekus model. We consider separately param... Read More about Interplay of edge fracture and shear banding in complex fluids.

Thickening of viscoelastic flow in a model porous medium (2017)
Journal Article
Hemingway, E., Clarke, A., Pearson, J., & Fielding, S. (2017). Thickening of viscoelastic flow in a model porous medium. Journal of Non-Newtonian Fluid Mechanics, 251, 56-68. https://doi.org/10.1016/j.jnnfm.2017.11.002

We study numerically two-dimensional creeping viscoelastic flow past a biperiodic square array of cylinders within the Oldroyd B, FENE-CR and FENE-P constitutive models of dilute polymer solutions. Our results capture the initial mild decrease then d... Read More about Thickening of viscoelastic flow in a model porous medium.

Edge Fracture in Complex Fluids (2017)
Journal Article
Hemingway, E. J., Kusumaatmaja, H., & Fielding, S. M. (2017). Edge Fracture in Complex Fluids. Physical Review Letters, 119(2), Article 028006. https://doi.org/10.1103/physrevlett.119.028006

We study theoretically the edge fracture instability in sheared complex fluids, by means of linear stability analysis and direct nonlinear simulations. We derive an exact analytical expression for the onset of edge fracture in terms of the shear-rate... Read More about Edge Fracture in Complex Fluids.

Correlation lengths in hydrodynamic models of active nematics (2016)
Journal Article
Hemingway, E., Mishra, P., Marchetti, M., & Fielding, S. (2016). Correlation lengths in hydrodynamic models of active nematics. Soft Matter, 12(38), 7943-7952. https://doi.org/10.1039/c6sm00812g

We examine the scaling with activity of the emergent length scales that control the nonequilibrium dynamics of an active nematic liquid crystal, using two popular hydrodynamic models that have been employed in previous studies. In both models we find... Read More about Correlation lengths in hydrodynamic models of active nematics.

Viscoelastic and elastomeric active matter: Linear instability and nonlinear dynamics (2016)
Journal Article
Hemingway, E., Cates, M., & Fielding, S. (2016). Viscoelastic and elastomeric active matter: Linear instability and nonlinear dynamics. Physical Review E, 93(3), Article 032702. https://doi.org/10.1103/physreve.93.032702

We consider a continuum model of active viscoelastic matter, whereby an active nematic liquid crystal is coupled to a minimal model of polymer dynamics with a viscoelastic relaxation time τC. To explore the resulting interplay between active and poly... Read More about Viscoelastic and elastomeric active matter: Linear instability and nonlinear dynamics.

Moving contact line dynamics: from diffuse to sharp interfaces (2015)
Journal Article
Kusumaatmaja, H., Hemingway, E., & Fielding, S. (2016). Moving contact line dynamics: from diffuse to sharp interfaces. Journal of Fluid Mechanics, 788, 209-227. https://doi.org/10.1017/jfm.2015.697

We reconcile two scaling laws that have been proposed in the literature for the slip length associated with a moving contact line in diffuse interface models, by demonstrating each to apply in a different regime of the ratio of the microscopic interf... Read More about Moving contact line dynamics: from diffuse to sharp interfaces.

Active Viscoelastic Matter: From Bacterial Drag Reduction to Turbulent Solids (2015)
Journal Article
Hemingway, E., Maitra, A., Banerjee, S., Marchetti, M., Ramaswamy, S., Fielding, S., & Cates, M. (2015). Active Viscoelastic Matter: From Bacterial Drag Reduction to Turbulent Solids. Physical Review Letters, 114(9), Article 098302. https://doi.org/10.1103/physrevlett.114.098302

A paradigm for internally driven matter is the active nematic liquid crystal, whereby the equations of a conventional nematic are supplemented by a minimal active stress that violates time-reversal symmetry. In practice, active fluids may have not on... Read More about Active Viscoelastic Matter: From Bacterial Drag Reduction to Turbulent Solids.