5 papers
Energy transfer in turbulent channel flows and implications for resolvent modelling
Sean Symon, Simon J. Illingworth, Ivan Marusic
We analyse the inter-scale transfer of energy for two types of plane Poiseuille flow: the P4U exact coherent state of Park and Graham (2015) and turbulent flow in a minimal channel…
Energy transfer mechanisms and resolvent analysis in the cylinder wake
Bo Jin, Sean Symon, Simon J. Illingworth
Energy transfer mechanisms for vortex shedding behind a 2D cylinder at a Reynolds number of Re=100 are investigated. We first characterize the energy balances achieved by the true…
A tale of two airfoils: resolvent-based modelling of an oscillator vs. an amplifier from an experimental mean
Sean Symon, Denis Sipp, Beverley J. McKeon
The flows around a NACA 0018 airfoil at a Reynolds number of 10250 and angles of attack of alpha = 0 (A0) and alpha = 10 (A10) are modelled using resolvent analysis and limited exp…
The role of parasitic modes in nonlinear closure via the resolvent feedback loop
Kevin Rosenberg, Sean Symon, Beverley J. McKeon
We use the feedback loop of McKeon \& Sharma (2010), where the nonlinear term in the Navier-Stokes equations is treated as an intrinsic forcing of the linear resolvent operator, to…
Coherent structures in the linearized impulse response of turbulent channel flow
Sabarish B. Vadarevu, Simon J. Illingworth, Ivan Marusic
We study the evolution of velocity fluctuations due to an isolated spatio-temporal impulse using the linearized Navier-Stokes equations. The impulse is introduced as an external bo…