1 citations · 1 across the 3 of their papers we have counts for
5 papers
Oscillatory shear flows and a new 2D self-sustaining process
Theo A. Lewy, Rich R. Kerswell
A new self-sustaining process (SSP) is identified in an oscillating spatially-homogeneous shear flow using a nonlinear Kelvin mode model. This SSP consists of energetic spanwise-in…
Localised Arrowheads: The building blocks of elastic turbulence in rectilinear, sheared polymer flows
Theo A. Lewy, Rich R. Kerswell
Pressure-driven flow of a dilute polymer solution has been numerically observed to possess a form of elastic turbulence which is organised around the interactions of localised vers…
Elastic turbulence in highly entangled polymers and wormlike micelles
Theo A. Lewy, Suzanne M. Fielding, Peter D. Olmsted +1
We show theoretically that an initially homogeneous planar Couette flow of a concentrated polymeric fluid is linearly unstable to the growth of two-dimensional (2D) perturbations,…
Revisiting 2D Viscoelastic Kolmogorov Flow: A Centre-mode-driven transition
Theo Lewy, Rich Kerswell
We revisit viscoelastic Kolmogorov flow to show that the elastic linear instability of an Oldroyd-B fluid at vanishing Reynolds numbers () found by Boffetta et al. (J. Fluid Me…
The polymer diffusive instability in highly concentrated polymeric fluids
Theo Lewy, Rich Kerswell
The extrusion of polymer melts is known to be susceptible to `melt fracture' instabilities, which can deform the extrudate, or cause it to break entirely. Motivated by this, we con…