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Department of Applied Mathematics and Theoretical Physics

My work generally uses numerical simulations, bifurcation analysis and linear stability techniques to investigate fluid stability relating to:

  • Elastic turbulence in viscoelastic fluids (both concentrated and dilute regimes). 
  • Rayleigh-Bénard and internally heated convection.
  • Newtonian shear flows and the SSP.

Publications

Localized arrowheads: The building blocks of elastic turbulence in rectilinear, sheared polymer flows
T Lewy, R Kerswell
– Physical Review Fluids
(2026)
11,
L051301
Elastic Turbulence in Highly Entangled Polymers and Wormlike Micelles
TA Lewy, SM Fielding, PD Olmsted, RR Kerswell
– Physical review letters
(2026)
136,
104001
Revisiting two-dimensional viscoelastic Kolmogorov flow: a centre-mode-driven transition - CORRIGENDUM (Journal of Fluid Mechanics (2025) 1007 (A55) DOI: 10.1017/jfm.2025.119)
T Lewy, RR Kerswell
– Journal of Fluid Mechanics
(2025)
1012,
e1
Revisiting 2D Viscoelastic Kolmogorov Flow: A Centre-mode-driven transition
T Lewy, RR Kerswell
– Journal of Fluid Mechanics
(2025)
1007,
a55
The polymer diffusive instability in highly concentrated polymeric fluids
T Lewy, R Kerswell
– Journal of Non Newtonian Fluid Mechanics
(2024)
326,
105212

Research Group

High-Reynolds-Number Fluid Flow

Room

H2.01