Simon Illingworth

Optimal sensor and actuator placement for feedback control of vortex shedding

Bo Jin, Simon J Illingworth, Richard D Sandberg

Journal article  |  2022  |  Journal of Fluid Mechanics

We consider linear feedback control of the two-dimensional flow past a cylinder at low Reynolds numbers, with a particular focus o..

Linear-model-based estimation in wall turbulence: improved stochastic forcing and eddy viscosity terms

Vikrant Gupta, Anagha Madhusudanan, Minping Wan, Simon J Illingworth, Matthew P Juniper

Journal article  |  2021  |  JOURNAL OF FLUID MECHANICS

We use Navier-Stokes-based linear models for wall-bounded turbulent flows to estimate large-scale fluctuations at different wall-n..

Energy transfer mechanisms and resolvent analysis in the cylinder wake

Bo Jin, Sean Symon, Simon J Illingworth

Journal article  |  2021  |  PHYSICAL REVIEW FLUIDS

We investigate energy transfer mechanisms for vortex shedding in the two-dimensional cylinder wake at a Reynolds number of Re=100...

Linear control of coherent structures in wall-bounded turbulence at Re-tau=2000

Stephan F Oehler, Simon J Illingworth

Journal article  |  2021  |  INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW

We consider linear feedback flow control of the largest scales in an incompressible turbulent channel flow at a friction Reynolds ..

Energy transfer in turbulent channel flows and implications for resolvent modelling

Sean Symon, Simon J Illingworth, Ivan Marusic

Journal article  |  2021  |  JOURNAL OF FLUID MECHANICS

We analyse the inter-scale transfer of energy for two types of plane Poiseuille flow: the P4U exact coherent state of Park & Graha..

Resolvent analysis predictions of energy transfer in turbulent channel flow

Sean Symon, Simon Illingworth, Ivan Marusic

Conference Proceedings  |  2020  |  Proceedings of the 22nd Australasian Fluid Mechanics Conference AFMC2020

Energy transfer mechanisms and resolvent analysis in the cylinder wake

Bo Jin, Sean Symon, Simon Illingworth

Conference Proceedings  |  2020  |  Proceedings of the 22nd Australasian Fluid Mechanics Conference AFMC2020

Feedback control of vortex shedding using a resolvent-based modelling approach

Bo Jin, Simon J Illingworth, Richard D Sandberg

Journal article  |  2020  |  Journal of Fluid Mechanics

An investigation of optimal feedback controllers’ performance and robustness is carried out for vortex shedding behind a two-dimen..

A direct comparison of pulsatile and non-pulsatile rough-wall turbulent pipe flow

TO Jelly, RC Chin, SJ Illingworth, JP Monty, I Marusic, A Ooi

Journal article  |  2020  |  Journal of Fluid Mechanics

Pulsatile rough-wall turbulent pipe flow is compared against its non-pulsatile counterpart using data obtained from direct numeric..

Large-scale structures predicted by linear models of wall-bounded turbulence

S Symon, SJ Illingworth, I Marusic

Conference Proceedings  |  2020  |  Journal of Physics: Conference Series, Volume 1522, Fourth Madrid Summer School on Turbulence 10 June to 12 July 2019, Madrid, Spain

The objective of this article is to determine for which scales stochastic forcing of the linearized Navier-Stokes equations, recas..